All Free Online Tools — No Sign Up, No Upload

Convert PNG images to JPG format instantly in your browser. No upload required.

Convert JPG images to PNG format with transparency support.

Convert WebP images to PNG format for broader compatibility.

Convert PNG images to WebP for smaller file sizes and faster loading.

Convert SVG vector graphics to PNG raster images at any resolution.

Convert iPhone HEIC photos to universally compatible JPG format.

Convert AVIF images to JPG or PNG format instantly in your browser.

Convert JPEG XL (JXL) images to JPG or PNG format in your browser.

Convert WebP images to JPG or PNG format for universal compatibility.

Convert images between JPG, PNG, WebP, BMP, and more formats with optional resizing.

Resize images to exact dimensions or by percentage. Supports batch resizing.

Compress images to reduce file size while maintaining quality.

Crop images to custom dimensions or predefined aspect ratios.

Compress up to 100 images at once with adjustable quality. Download as ZIP.

Combine multiple PDF files into a single document. Drag to reorder.

Split a PDF into separate files by page range or individual pages.

Reduce PDF file size while preserving quality. Great for email attachments.

Convert PDF pages to high-quality JPG or PNG images.

Convert one or more images into a PDF document.

Convert video files to MP4 format directly in your browser.

Create animated GIFs from video clips with custom settings.

Compress video files to reduce size while maintaining visual quality.

Trim and cut video files to extract the parts you need.

Format, validate, and beautify JSON data with syntax highlighting.

Pick colors and convert between HEX, RGB, HSL, and CMYK formats.

Minify CSS code to reduce file size and improve page load speed.

Minify JavaScript code to reduce file size for production.

Minify HTML code by removing whitespace, comments, and unnecessary attributes.

Test and debug regular expressions with real-time matching and explanations.

Count words, characters, sentences, and paragraphs in your text.

Convert text between uppercase, lowercase, title case, and more.

Compare two texts and highlight the differences between them.

Generate placeholder text in paragraphs, sentences, or words.

Write Markdown and see a live preview with syntax highlighting.

Convert audio files between MP3, WAV, OGG, AAC, and FLAC formats.

Trim and cut audio files to extract the parts you need.

Generate strong, secure passwords with customizable length and complexity.

Generate unique UUIDs (v1, v4, v7) for your applications.

Generate QR codes for URLs, text, WiFi, and more. Download as PNG or SVG.

Generate barcodes in various formats including Code 128, EAN, and UPC.

Create beautiful CSS gradients with a visual editor. Linear, radial, and conic gradients.

Place screenshots in device frames. iPhone, MacBook, iPad, and more.

Convert CSV data to JSON and JSON to CSV format online.

Generate harmonious color palettes with 6 modes. Lock colors, adjust HSL, check contrast, export as CSS/Tailwind/SCSS/JSON.

Generate favicons in all required sizes from a single image.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files.

Generate random numbers, dice rolls, coin flips, and lottery picks.

Encode text or files to Base64 and decode Base64 strings back.

Encode and decode URLs instantly. Handle special characters, unicode, query strings. Free online tool.

Encode and decode HTML entities for safe rendering in web pages.

Decode and inspect JSON Web Tokens to view header, payload, and signature.

Translate text to Morse code and Morse code back to text.

Format and beautify SQL queries with proper indentation and syntax.

Format and prettify XML documents with proper indentation.

Format and beautify HTML code with proper indentation and structure.

Format and beautify CSS code with consistent spacing and indentation.

Compress JavaScript code by removing comments and unnecessary whitespace.

Convert JSON data to YAML format for configuration files.

Convert JSON data to XML format and XML back to JSON.

Convert JSON arrays to CSV format for spreadsheets and data analysis.

Convert Unix timestamps to human-readable dates and vice versa.

Convert numbers between binary, octal, decimal, and hexadecimal bases.

Repeat text multiple times with custom separators. Supports emoji and Unicode.

Reverse, shuffle, sort lines, remove duplicates, and more text operations.

Generate cool Unicode text styles for social media bios and posts.

Search, browse, and copy emojis by name or category.

Calculate percentages, percentage change, and percentage of a number.

Calculate the difference between dates, add or subtract days.

Convert salary between hourly, daily, weekly, biweekly, monthly, and yearly amounts.

Calculate your Body Mass Index and see your weight category.

Calculate tips and split bills between multiple people.

Calculate exact age in years, months, and days from a birth date.

Extract all email addresses from any text block. Deduplicated, sorted, and ready to export.

Find your public IP address and geolocation information instantly.

Look up domain registration information and ownership details.

Generate a complete privacy policy for your website or app. Free, customizable, GDPR and CCPA ready.

Convert images to Base64 data URIs for embedding in HTML or CSS. Supports JPG, PNG, WebP, GIF, SVG.

Read and view photo metadata including camera info, GPS coordinates, and exposure settings.

Extract text from images using OCR technology. Supports multiple languages.

Extract dominant colors and generate a color palette from any image.

Add text watermarks to images with customizable position, opacity, size, and rotation.

Generate valid XML sitemaps with priority, changefreq, and lastmod for every URL.

Check URL redirect chains, status codes, and final destinations.

Build UTM-tagged campaign URLs for Google Analytics tracking.

Check Open Graph and Twitter Card meta tags and preview social sharing.

Generate JSON-LD structured data for Articles, Products, FAQs, and more.

Create professional invoices with customizable templates. Add line items, taxes, and discounts.

Create Open Graph images for social media sharing with custom text, colors, and layouts.

Generate custom placeholder images with configurable size, colors, and text.

Generate SEO meta tags with live Google, Facebook, and Twitter previews.

Create robots.txt files with user-agent rules, sitemaps, and crawl directives.

Generate Apache .htaccess rules for redirects, security headers, caching, and more.

Design CSS box shadows visually with multiple layers, presets, and live preview.

Preview and generate CSS border-radius with individual corner controls.

Build flexbox layouts visually with controls for direction, alignment, wrapping, and gap.

Build CSS Grid layouts visually with template columns, rows, gap, and auto-flow controls.

Create custom CSS clip-path shapes with draggable polygon points and presets.

Create CSS keyframe animations visually with timing controls and live preview.

Generate SVG wave backgrounds with customizable layers, colors, and shapes.

Build cron schedules visually with human-readable descriptions and next run times.

Calculate Unix file permissions with interactive checkboxes for owner, group, and other.

Create SEO-friendly URL slugs from any text with accent transliteration and options.

Navigate JSON data interactively and copy JSONPath expressions for any node.

Compare two code blocks side by side with syntax-aware diff and line numbers.

Convert HTML to clean Markdown with support for headings, links, lists, tables, and code blocks.

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats with live preview.

Convert between length, weight, temperature, speed, area, volume, storage, and time units.

Convert text to binary, hex, octal, and decimal representations and back.

Listen to text using Web Speech API with voice selection, speed, and pitch controls.

Focus timer with Pomodoro technique, session tracking, and sound notifications.

Full-featured photo editor with brightness, contrast, filters, crop, rotate, text overlay, and freehand drawing.

Create photo collages with template layouts, custom gaps, borders, and backgrounds. Export as PNG.

Create memes with custom text layers, drag positioning, font control, and Impact font styling.

Build professional resumes with 3 templates, live preview, and PDF export. No account required.

Design professional business cards with 4 templates and export PNG at 300 DPI print quality.

Create professional HTML email signatures with 5 templates, social links, and photo upload.

Create custom certificates with 4 types, border styles, logo/signature upload, and PDF/PNG export.

Open CSV files online with sortable columns, filterable rows, search, and SUM/AVG/MIN/MAX calculations.

Write and run HTML, CSS, and JavaScript with live preview, console output, and shareable URLs.

Full Markdown editor with toolbar, live preview, auto-save, and export to Markdown, HTML, or PDF.

Visual JSON tree editor with add/remove keys, type changes, search, undo/redo, and import/export.

Edit CSV files online with a spreadsheet-like table. Add/remove rows and columns, sort, filter, export CSV or JSON.

Test REST APIs with GET, POST, PUT, DELETE, PATCH. Custom headers, body, response viewer, and session history.

Add gradient backgrounds, device frames, padding, and shadows to make screenshots pitch-deck ready.

Full scientific calculator with arithmetic, trigonometry, logarithms, and calculation history. Keyboard support.

Convert between 30+ world currencies with a swap button and live conversion. Rates are approximate.

Calculate monthly payments, total interest, and view an amortization table for any loan.

Calculate mortgage payments with property tax, insurance, and down payment. Full monthly breakdown.

Calculate final price after discount or find the discount percentage from original and final prices.

Convert pixels to rem units and back. Configurable base font size with a reference table.

Calculate width or height for any aspect ratio. Common presets for 16:9, 4:3, 1:1, 21:9, 9:16.

Precise stopwatch with start, stop, reset, and lap times. Millisecond accuracy. Keyboard support.

Set a countdown timer with audio alert. Quick presets for 1, 5, 10, 15, 30, and 60 minutes.

View current time in cities worldwide. Add, remove, and search timezones with live updates.

Set alarms with audio alerts and snooze. Support for multiple alarms running simultaneously.

Simple notepad that auto-saves to your browser. Word and character count. Download as .txt file.

Convert typed text into handwriting-style images on lined paper. Download as PNG.

Generate TypeScript interfaces from JSON data. Handles nested objects, arrays, and optional fields.

Convert between Celsius, Fahrenheit, and Kelvin instantly. Bidirectional live conversion.

Convert between kilograms, pounds, ounces, grams, milligrams, stone, and tons.

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.

Convert between bytes, KB, MB, GB, TB, and PB. Supports both binary (1024) and decimal (1000) modes.

Convert between km/h, mph, m/s, knots, and Mach. Bidirectional live conversion.

Convert times between timezones. Select source and target zones with common presets.

Generate random colors with hex, RGB, and HSL values. Build palettes, lock colors, and regenerate.

Create CSS gradient backgrounds with mesh, multi-stop, and radial options. Copy CSS for body backgrounds.

Build CSS text-shadow effects with offset, blur, color, and multiple shadow layers. Live preview.

Design CSS buttons with padding, border-radius, colors, shadows, and hover states. Copy HTML + CSS.

Generate HTML or Markdown tables with dynamic rows and columns. Fill in cells and export.

Calculate network address, broadcast, host range, subnet mask, and number of hosts from IP + CIDR.

Convert Unix epoch timestamps to human-readable dates. Supports ms, s, ISO 8601, RFC 2822. Batch convert.

Validate YAML syntax, show errors with line numbers, format/beautify, and convert YAML to JSON.

Calculate daily calorie needs using Mifflin-St Jeor BMR formula. Input age, gender, height, weight, activity level.

Convert kitchen measurements: cups, tablespoons, ml, oz, grams, Fahrenheit, Celsius. Common ingredient densities.

Convert shoe sizes between US, EU, UK, and CM. Men and Women tables.

Simulate how images or colors appear with protanopia, deuteranopia, and tritanopia color blindness.

Paste HTML and see a live rendered preview. Side-by-side editor and preview like a mini CodePen.

Paste a CSS selector to see its specificity score (a,b,c). Compare two selectors to find the winner.

Searchable reference of all HTTP status codes with descriptions, categories, and common use cases.

Generate signed JWT tokens with custom payload, secret, and algorithm (HS256/HS384/HS512). Client-side HMAC.

Paste SVG to clean metadata, comments, empty groups, and unused attributes. Before/after size comparison.

Estimate CO2 emissions from flights, car travel, and home energy. See total footprint and tips to reduce.

Generate a QR code for Wi-Fi auto-connect. Input SSID, password, and encryption type.

Input multiple cron expressions and view next 10 run times for each, overlaid on a visual timeline.

Track daily habits, build streaks, and visualize your consistency with weekly and monthly views. All data saved locally.

Add, complete, and delete tasks with drag reorder, categories, tags, and due dates. Auto-saves to your browser.

Organize tasks in Todo, In Progress, and Done columns. Drag cards between columns. Saved locally.

Canvas-based drawing with pen, eraser, shapes, text, colors, and undo/redo. Download as PNG.

Create flashcards with front and back. Study mode with flip animation and progress tracking. Import/export JSON.

Measure your typing speed in WPM with accuracy tracking, error analysis, and multiple difficulty levels.

Calculate compound interest with principal, rate, time, and compounding frequency. Year-by-year breakdown.

Calculate savings growth with monthly deposits, interest rate, and years. Visual growth chart.

Calculate income tax owed, effective rate, and take-home pay for US, UK, and FR tax brackets.

Track expenses by category and date. Monthly totals, category summary, and CSV export. Auto-saved locally.

Calculate return on investment, net profit, and payback period from investment cost and return value.

Live 280-character counter for tweets. Shows remaining characters, counts URLs as 23 chars.

Generate 30 related hashtags from keywords. Grouped by popular, niche, and trending. Copy all at once.

Generate professional, casual, or funny social media bios from your name, profession, and interests.

Upload an image and add bold text overlay with customizable font size, color, stroke, and position. Download PNG.

Resize images to all social media sizes at once — Instagram, Facebook, Twitter, YouTube, LinkedIn. Download all.

Generate glassmorphism CSS with live preview. Control blur, transparency, border, and background color.

Generate neumorphic CSS with live preview. Control distance, intensity, blur, and shape type.

Generate random organic blob shapes. Control complexity, contrast, and color. Download SVG or copy code.

Generate CSS patterns: stripes, dots, grid, waves, zigzag, checkerboard. Customize colors, size, and angle.

Create mesh gradients with 4 draggable color points. Generates CSS with layered radial gradients. Copy CSS.

Online metronome with BPM slider, tap tempo, visual beat indicator, and time signatures. Web Audio powered.

Generate precise audio tones from 20-20000 Hz. Choose waveform, adjust volume, and see note names.

Generate white, pink, or brown noise for focus, sleep, or relaxation. Timer and volume controls.

Tap to the beat to calculate BPM. Shows average from last 8 taps. Keyboard support with spacebar.

Upload audio and see real-time waveform and frequency visualizations. Canvas and Web Audio API powered.

Generate .gitignore files for any project type. Select language, framework, and IDE templates.

Generate professional README.md files with badges, install instructions, usage, and license sections.

Generate Dockerfiles for Node, Python, Go, Java, Nginx, and Alpine. Configure port, env vars, and commands.

Paste HTML with Tailwind classes and get them sorted in the recommended order automatically.

Generate valid package.json files with name, scripts, dependencies, and metadata. Copy or download.

Random arithmetic problems with difficulty levels. Timer, score tracking, and streak counter.

Interactive periodic table with element details. Search by name or symbol. Color-coded by category.

Analyze text readability with Flesch-Kincaid, Gunning Fog, Coleman-Liau, and SMOG indexes.

Interactive multiplication grid 1-12 with hover highlights. Practice mode with random questions.

Add items and spin the wheel or pick randomly. Animated canvas wheel with sound effects and history.

Encrypt and decrypt text with AES-GCM using Web Crypto API. Password-based real encryption.

Upload an image containing a QR code to decode its content. Supports camera scanning.

Detect screen resolution, viewport size, pixel ratio, color depth, orientation, and touch support.

Generate fake names, emails, addresses, phones, companies, dates, UUIDs, and IPs. Export JSON or CSV.

Check color contrast ratio for WCAG AA and AAA compliance. Suggests closest passing colors.

Type or paste rich text with formatting (bold, italic, headings, lists) and generate a PDF instantly in your browser.

Paste long text and get an extractive summary with the most important sentences highlighted.

Compare two texts for similarity using Jaccard and n-gram analysis. Highlights matching phrases.

Basic rule-based grammar checker that catches double spaces, capitalization errors, and common mistakes.

Convert plain text to a clean PDF with options for font size, margins, and page size.

Convert any image to ICO favicon format with multiple sizes (16, 32, 48px) in one file.

Upload multiple images and combine them into an animated GIF with customizable frame delay and size.

Flip images horizontally or vertically with live preview and instant download.

Rotate images by 90°, 180°, 270° or any custom angle with live preview.

Remove solid-color backgrounds from images using color-based threshold. Pick background color and adjust tolerance.

Build responsive HTML email templates with a visual editor. Add headers, text, images, buttons, and more.

Generate trust badges for your website: GDPR Compliant, No Cookies, SSL Secured, Privacy First. Download PNG or SVG.

Validate XML sitemap structure, check URL count, find errors and display issues clearly.

Generate CSS triangles with customizable direction, size, and color using the border trick. Live preview.

Input any hex color and find the closest named CSS color with distance visualization.

Paste JSON and generate Go struct definitions with proper types and naming conventions.

Paste JSON and generate Python dataclass or TypedDict definitions with nested type support.

Paste CREATE TABLE SQL statements and generate Prisma schema models with types and constraints.

Generate .env files from templates. Select services like DB, Stripe, Auth, AWS, and get properly commented environment variables.

Translate cron expressions to plain English and vice versa. Bidirectional cron schedule translator.

Practice typing with custom text or preloaded lessons. Real-time WPM, accuracy, and error highlighting.

Pick which multiplication tables to practice (1-12). Timed quiz with score, streak, and wrong-answer review.

Interactive unit circle showing angles in degrees/radians with sin, cos, tan values. Click any angle to highlight.

Random binary numbers to convert to decimal. Timer, score, and difficulty levels (4-bit, 8-bit, 16-bit).

See a hex color and guess which option matches. Score, streak, and a fun way to learn color names.

Calculate recommended daily water intake based on weight, activity level, and climate. Track glasses today.

Find optimal bedtimes or wake-up times based on 90-minute sleep cycles. Get 4, 5, or 6 full cycles.

Enter your birthday and see your exact age in years, months, days, hours, minutes, seconds — live updating.

Enter two names and get a fun compatibility score with heart animation. Deterministic and just for fun.

Generate random names by gender and nationality. Covers English, French, Spanish, German, and Japanese names.

Visual regex builder with preset patterns, component selection, generated regex with explanation, and test field.

Apply gradients to text with customizable direction and color stops. Live preview and copy CSS code.

Paste Tailwind utility classes and get the equivalent raw CSS output. Maps common Tailwind utilities to CSS.

Input one color and generate 10 shades (50-950 like Tailwind). Copy hex values or export as CSS variables.

Convert text to ASCII art using various font styles like block, banner, and small. Copy output instantly.

Set a future date and see a live countdown in days, hours, minutes, seconds. Presets for holidays.

Convert your pet's age to human years based on species and breed size. Shows life stage information.

Display random motivational, funny, or wisdom quotes. Filter by category and copy any quote.

Ask a question and get an animated coin flip or answer. History of decisions. Fun and simple.

Analyze password strength: length, character types, entropy, estimated crack time. Never stores or transmits passwords.

Add or remove VAT from any price. Supports 20+ countries with correct rates. Net to Gross and Gross to Net.

Calculate sales tax for all 50 US states. Enter price, select state, get total with tax breakdown.

Calculez la TVA en France : taux normal 20%, intermédiaire 10%, réduit 5.5%, super-réduit 2.1%. HT vers TTC et TTC vers HT.

Calculate UK income tax with 2025/2026 bands. Personal allowance, basic, higher, additional rate, and National Insurance.

Calculate your ideal hourly and daily rate based on target income, expenses, holidays, and working hours.

Calculate gross margin, markup percentage, and profit from cost and selling price. Or find the selling price from target margin.

Estimate your net paycheck after federal tax, state tax, Social Security, and Medicare deductions.

Calculate invoice totals with multiple line items, tax rates, and discounts. Multi-tax support for GST, PST, and more.

Convert CSV files to Excel (.xlsx) format. Upload or paste CSV data, download as a proper spreadsheet.

Convert JSON arrays to Excel spreadsheets. Flattens nested objects into columns for easy viewing.

Convert Markdown text to a clean, typographic PDF document. Preview and download instantly.

Convert HTML code to PDF. Paste HTML, preview the rendered output, then download as PDF.

Convert tab-separated or custom-delimited text to CSV format. Preview as table, then download.

Convert between L/100km, MPG (US), MPG (UK), and km/L. Bidirectional fuel economy conversion.

Complete paper size reference: A0-A10, B0-B10, Letter, Legal, Tabloid. Dimensions in mm, cm, inches, and pixels at various DPI.

Convert between Pa, kPa, bar, atm, psi, mmHg, and torr. Bidirectional pressure unit conversion.

Convert between Joules, kJ, calories, kcal, kWh, BTU, and eV. Bidirectional energy unit conversion.

Convert between degrees, radians, gradians, turns, arc minutes, and arc seconds.

Convert between square meters, square kilometers, hectares, acres, square feet, square yards, and square miles.

Convert between mL, L, gallons (US/UK), quarts, pints, cups, fluid ounces, and cubic meters.

Roll 1 to 10 dice of any type: d4, d6, d8, d10, d12, d20, d100. Animated rolls with history.

Split a list of names into random, balanced teams. Shuffle animation and instant results.

Generate random lottery numbers for Mega Millions, Powerball, EuroMillions, Loto France, or custom draws.

Add names and spin a colorful wheel to pick a random winner. Animated with sound. Elimination mode available.

Random "Would You Rather" questions from a database of 100+. Pick a side, track your answers, share results.

Apply gaussian blur to any image. Adjustable blur radius from 1-50px. Preview and download.

Apply pixelation effect to images. Adjustable pixel size from 2-50px.

Convert any image to grayscale (black and white) instantly in your browser.

Apply a warm sepia tone to images. Adjustable intensity slider.

Adjust brightness and contrast of images with dual sliders. Real-time preview.

Add grain/noise effect to images. Adjustable intensity. Canvas pixel manipulation.

Add dark vignette edges to photos. Adjustable intensity with radial gradient overlay.

Generate professional Terms of Service for websites, apps, and SaaS platforms.

Generate GDPR-compliant cookie policies with support for analytics and marketing cookies.

Generate mutual or one-way Non-Disclosure Agreements with customizable terms.

Generate disclaimers for blogs, e-commerce, professional, medical, and legal websites.

Identify the manufacturer of any network device by its MAC address. 200+ vendor database.

Calculate IP ranges from CIDR notation or convert IP ranges to CIDR blocks.

Searchable table of 80+ common network ports with protocol and service info.

Parse user agent strings to detect browser, OS, device type, and rendering engine.

Estimate shipping costs based on package dimensions and weight. Compare carrier rates.

Generate standardized SKU codes from product attributes. Batch generation and CSV export.

Calculate net profit, margin, and ROI with marketplace fee presets for Amazon, eBay, Shopify, Etsy.

Read barcodes from images or camera. Supports EAN-13, UPC-A, Code128, QR codes.

Compare prices per unit across products to find the best value. Auto-ranking.

Calculate electricity cost for any appliance. Watts, hours, price per kWh. Common presets.

Convert between seconds, minutes, hours, days, weeks, months, years, decades, centuries.

Convert between decimal numbers and Roman numerals. Bidirectional with validation.

Convert between hexadecimal, decimal, binary, and octal. Large number support.

Visual Unix permission editor with explanations for each bit and common patterns reference.

Calculate your ideal weight range using Hamwi, Devine, Robinson, and Miller formulas based on height and gender.

Estimate your due date, current week, trimester, and key milestones from your last menstrual period or conception date.

Calculate your max heart rate and 5 training zones: Recovery, Fat Burn, Cardio, Hard, and Max based on your age.

Interactive blood type compatibility chart. See who you can donate to and receive from, including Rh factor.

Log meals with calories and macros. Track daily intake against your goal. Saved locally in your browser.

Upload a file to compute MD5, SHA-1, and SHA-256 checksums. Paste an expected hash to verify integrity.

Encode and decode Base58 (Bitcoin alphabet). Used in cryptocurrency addresses and other applications.

Learn about SSL/TLS certificates, how they work, and the differences between DV, OV, and EV certificates.

Generate time-based one-time passwords (2FA codes) from a TOTP secret. Live 30-second countdown with Web Crypto API.

Encrypt a message with a password using AES-GCM. Share the encrypted text safely. Zero-knowledge, client-side only.

Define mock API endpoints with methods, paths, response bodies, status codes, and delays. Export as JSON config.

Generate GraphQL type definitions, queries, and mutations from entity names and fields. Copy SDL output.

Visually build SELECT, INSERT, UPDATE, and DELETE SQL queries. Pick columns, conditions, ordering, and limits.

Generate popular CSS resets: Eric Meyer, Normalize.css, Modern Reset, or custom. Configure and copy.

Generate nginx server blocks with server name, port, SSL, reverse proxy, and caching configuration.

Searchable reference of all ARIA roles, states, and properties with examples and best practices.

Upload an image and write accessible alt text with guidelines, character counter, and good vs bad examples.

Check if your font size meets WCAG accessibility recommendations. See equivalent sizes and responsive preview.

Generate a full color palette from a brand color where all combinations pass WCAG AA contrast requirements.

Paste HTML to analyze H1-H6 usage. View hierarchy tree and flag issues like skipped levels or multiple H1s.

Calculate straight-line distance between two coordinates using the Haversine formula. Results in km and miles.

Select two timezones to see current time in each and the difference in hours, accounting for DST.

Generate a packing checklist based on destination type, duration, and climate. Toggle, customize, and print.

Estimate flight time between two cities based on distance and average cruising speed.

Plan your travel budget: see local currency equivalent, tipping customs, and average costs for meals, transport, and hotels.

Rotate all or specific pages of a PDF by 90, 180, or 270 degrees. Free, private, no upload.

Add customizable page numbers to your PDF documents. Choose position, format, font size, and starting number.

Add a text watermark to every page of your PDF. Configure text, opacity, rotation, position, and color.

Encrypt your PDF with a password to restrict access. Set an open password and download the protected file.

Remove password protection from a PDF. Enter the current password and download the unlocked version.

Calculate mean, median, mode, range, variance, standard deviation, quartiles, and more from a set of numbers.

Add, subtract, multiply matrices. Compute determinant, transpose, and inverse for matrices up to 4x4.

Solve quadratic equations (ax² + bx + c = 0). Get real or complex roots, discriminant, vertex, and axis of symmetry.

Add, subtract, multiply, and divide fractions. Simplify results and convert to mixed numbers.

Find the Greatest Common Divisor and Least Common Multiple of two or more numbers using the Euclidean algorithm.

Compare renting vs buying a home. See break-even year and 30-year total cost for both scenarios.

Calculate annual ROI, cash-on-cash return, and cap rate for rental property investments.

Calculate stamp duty or property transfer tax for UK, Australia, and Singapore with current rate bands.

Estimate your moving costs based on distance, number of rooms, and extra services like packing and piano moving.

Score your headline based on word count, power words, emotional impact, numbers, and readability. Get tips to improve.

Generate 10 compelling call-to-action button texts for your product or service. Copy any CTA with one click.

Determine if your A/B test results are statistically significant using a chi-squared test. See confidence level and lift.

Calculate click-through rate from impressions and clicks. Compare against industry benchmarks.

Convert text to NATO phonetic alphabet spelling (Alpha, Bravo, Charlie...). Hear pronunciation with text-to-speech.

Convert numbers to written words in English, French, Spanish, and German. Supports decimals and negatives up to trillions.

Generate Dart/Flutter model classes from JSON with fromJson and toJson methods. Handles nested objects and arrays.

Generate Swift Codable structs from JSON with proper Swift types and naming conventions.

Generate Kotlin data classes from JSON. Handles nested objects, arrays, and nullable fields.

Convert JPG images to WebP format for smaller file sizes and faster loading.

Convert JPG images to AVIF format for superior compression. Browser support varies.

Convert BMP images to PNG format with lossless compression.

Convert BMP images to JPG format with quality control.

Convert GIF images to PNG format. Extracts the first frame from animated GIFs.

Convert TIFF images to JPG format. Browser TIFF support varies.

Convert ICO favicon files to PNG format for easy viewing and editing.

Convert PNG images to SVG vector format using simplified tracing.

Extract frames from WebP images. Static frame extraction for animated WebP files.

Convert SVG vector graphics to JPG raster images with white background.

Generate random valid IP addresses. Supports IPv4 and IPv6 with private range exclusion.

Generate random MAC addresses in multiple formats.

Generate valid test credit card numbers using the Luhn algorithm. For testing only.

Validate IBAN numbers with checksum verification and country format checking.

Format phone numbers to international, national, and E.164 formats.

Convert dates to 20+ formats including ISO 8601, Unix timestamp, and RFC 2822.

Format numbers with thousands separators, currency, scientific notation, and more.

Convert bytes to human-readable sizes. Supports binary and decimal standards.

Mix two colors with additive or subtractive blending. Shows gradient steps.

Extract and edit individual color stops from CSS gradient strings.

Calculate the exact age difference between two people in years, months, and days.

Find your day of birth, zodiac sign, Chinese zodiac, birthstone, and birth flower.

Calculate your GPA on a 4.0 scale. Add courses with credits and grades.

Calculate weighted grades and find what score you need on the final.

Split bills with custom tip percentages and per-person breakdown.

Add multiple time durations together. Perfect for timesheets and project tracking.

Calculate weekly work hours with overtime, breaks, and estimated pay.

Calculate paint needed for a room accounting for doors, windows, and coats.

Calculate tiles needed for a floor or wall with wastage and grout estimates.

Calculate concrete volume for slabs, footings, and columns with bag counts.

Calculate wallpaper rolls needed for any room with waste percentage.

Calculate flooring materials needed for wood planks, tiles, carpet, or vinyl.

Calculate fabric needed for curtains based on window size and style.

Calculate fence posts, rails, and boards needed for any perimeter.

Calculate grass seed needed for new lawn, overseeding, or repair.

Calculate mulch volume in cubic yards and bags needed.

Running pace calculator with split times for any distance.

Estimate one-rep max using Brzycki, Epley, and more formulas.

Estimate body fat percentage using the US Navy method.

Calculate daily protein, carbs, and fat from calorie target and goal.

Convert steps walked to distance based on height and stride length.

Calculate calories burned for 30+ activities by duration and weight.

Calculate break-even point in units and revenue with price sensitivity.

Calculate startup runway from cash, expenses, and revenue.

Calculate Monthly Recurring Revenue with plans, churn, and ARR.

Calculate customer lifetime value from ARPU, churn, and margin.

Calculate customer acquisition cost from marketing and sales spend.

Estimate startup valuation using revenue multiples by business type.

Scale recipe ingredients proportionally to any serving size.

Convert baking measurements between cups, grams, and ounces by ingredient.

Calculate coffee-to-water ratios for 8 brewing methods.

Calculate pizza dough ingredients by style: Neapolitan, NY, Detroit.

Estimate blood alcohol content from drinks, weight, and time.

Tipping customs for 30 countries covering restaurants, taxis, and hotels.

Flip text upside down using Unicode characters for social media.

Generate strikethrough text using Unicode combining characters.

Convert text to superscript or subscript using Unicode.

Generate glitchy Zalgo text with adjustable intensity.

Generate small text and tiny caps using Unicode for social media.

Generate mirrored and reversed text using Unicode characters.

Calculate monthly car payments, total cost, and total interest from price, down payment, rate, and term.

Calculate trip fuel cost from distance, fuel consumption, and fuel price.

Input tire size (e.g. 225/45R17) to get diameter, width, sidewall height, circumference, and revolutions per km.

Estimate horsepower from 0-60 mph time and vehicle weight using the Trap Speed method.

Estimate your car current value based on purchase price and age using declining balance depreciation.

Allocate your wedding budget across venue, catering, photography, and more with customizable percentages.

Calculate tables needed from guest count and table size. Assign guests to tables.

Set your wedding date and see a live countdown in days, hours, minutes, and seconds.

Timeline checklist from 12 months before to the wedding day. Track your progress with localStorage.

Track RSVPs: attending, not attending, pending. Visual pie chart and exportable list.

Generate random baby names filtered by gender and origin. See meanings and save favorites.

Calculate your baby due date from last period with week-by-week development summary.

Estimate diapers needed per day, month, and year based on baby age, plus approximate cost.

Plot your baby weight and height on WHO growth percentile charts. Track over time with localStorage.

Get recommended feeding schedules by baby age for breastfeeding and formula with amounts and frequency.

Split player names into balanced random teams with options for team count and captain mode.

Random truth or dare questions in clean, party, and couples categories. 200+ questions.

Random "Never Have I Ever" statements in clean, spicy, and travel categories. 200+ statements.

Random words and phrases for charades in movies, animals, actions, and objects categories with timer.

Random trivia questions in science, history, geography, sports, and entertainment. Multiple choice with scoring.

Select root note and chord type to see all notes in the chord with piano keyboard visualization.

Input notes or chords to determine the musical key. Detects major and minor keys.

Convert BPM to milliseconds per beat, beats per second, and time signature durations.

Convert frequency in Hz to the closest musical note with cents deviation. A4=440Hz reference.

Paste lyrics to get word count, unique words, most used words, and estimated song duration by genre.

Classic physics calculator: input any 2 of speed, distance, time to calculate the 3rd.

Calculate voltage, current, resistance, and power using Ohm's Law. Input any 2, get the rest.

Convert any number to all SI prefixes from yocto to yotta. Scientific notation display.

Convert between frequency and wavelength using the speed of light. Shows electromagnetic spectrum position.

Calculate density from mass and volume, or solve for any variable. Common materials reference table.

Calculate recommended wire gauge (AWG) based on current, distance, and voltage drop. Reference table included.

Calculate the right resistor value for LEDs. Enter forward voltage, current, and supply voltage for series or parallel configs.

Calculate total capacitance for series and parallel capacitors. Also compute energy stored in a capacitor.

Decode resistor color bands to resistance value or encode a value to color bands. 4 and 5 band support with visual display.

Calculate total power draw for your PC build and get PSU wattage recommendation. Add CPU, GPU, RAM, drives, and fans.

Calculate how many plants fit in your garden bed based on square footage and plant spacing. Grid preview with common plants database.

Calculate how much soil you need for raised beds. Enter dimensions to get volume in cubic yards/meters and bags needed.

Estimate how much rainwater you can collect based on roof area and annual rainfall. Tank size recommendation included.

Calculate approximate daylight hours and sunrise/sunset times by latitude and month. Annual daylight chart.

Calculate your compost carbon-to-nitrogen ratio. Add green and brown materials to check if your mix is in the optimal range.

Convert ring sizes between US, EU, UK, Japan, diameter, and circumference. Full reference table.

Convert bra sizes between US, EU, UK, FR, and JP. Band and cup size conversion charts.

Convert clothing sizes between US, EU, and UK for men and women tops, pants, and dresses.

Find your color season (Spring, Summer, Autumn, Winter) based on skin undertone, hair color, and eye color. Palette suggestions.

Add your wardrobe items and generate random outfit combinations. Save your favorites.

Find rhyming words for any input. Database of 500+ words grouped by ending sound patterns.

Generate alliterative phrases by starting letter. Word database grouped by adjectives, nouns, and verbs.

Check if your poem is a valid haiku (5-7-5 syllable pattern). Counts syllables per line with word breakdown.

Generate a structured essay outline from your topic and thesis. Argumentative, expository, and persuasive templates.

Format citations in APA, MLA, Chicago, and Harvard styles. Enter source details and copy formatted citations.

Convert between Wei, Gwei, and Ether. Bidirectional conversion with common gas price reference.

Convert between Satoshi, mBTC, μBTC, and BTC. Bidirectional with quick reference guide.

Estimate crypto mining profitability. Enter hash rate, power consumption, and electricity cost for daily/monthly profit.

Validate crypto wallet address format for Bitcoin (Legacy, SegWit, Bech32), Ethereum, Litecoin, and Solana.

Calculate Ethereum transaction fees. Gas limit × gas price in Gwei. Common gas limits for transfers, swaps, and mints.

Open a virtual fortune cookie and reveal your fortune. 200+ messages database. Share with friends.

Ask a yes/no question and shake the Magic 8 Ball for an answer. Classic 20 responses with shake animation.

Select your zodiac sign and read your daily horoscope. Lucky numbers and mood predictions. For entertainment only.

Generate 10 nickname and username suggestions from your real name. Alliterations, abbreviations, and rhymes.

Generate random band names by genre: rock, electronic, indie, metal, or jazz. Adjective + noun combinations.

Calculate print dimensions from pixel size and DPI, or find required pixels for a print size.

Calculate total document size with bleed marks for professional printing.

Convert between pixels, points, em, rem, and percent font sizes with configurable base.

Upload an image to check its dimensions and calculate DPI at a given print size.

Reference of business card dimensions for US, Europe, Japan, and more in mm, inches, and pixels.

Generate a simple freelance service agreement with parties, scope, payment terms, and IP rights.

Create printable receipts with business info, items, tax, and payment method.

Generate formal business letters with proper formatting. Fill in details, copy, or print.

Create formatted meeting minutes with agenda, attendees, discussion notes, and action items.

Generate Standard Operating Procedures with title, purpose, scope, steps, and responsibilities.

Study basic vocabulary in Spanish, French, German, and Japanese with flashcards and quiz mode.

Test your Morse code knowledge. Listen to beeps or read dots and dashes, then type the letter.

Test your knowledge of world capitals. 50+ countries, multiple choice, score tracking.

Identify countries by their flags. 50 flags, multiple choice, streak tracking.

Quiz yourself on chemical element symbols and names from the periodic table.

Calculate the current moon phase, illumination percentage, and upcoming lunar phases.

Calculate your weight on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and the Moon.

Enter your birth date to find your zodiac sign, element, ruling planet, and personality traits.

Calculate distances to planets and stars in km, AU, light-years. See travel times at various speeds.

Calculate sunrise and sunset times for any location and date using solar position algorithms.

Paste a JSON array and render it as a sortable HTML table. Export to CSV.

Convert XML to JSON format with attribute and nested element support.

Convert YAML to JSON and JSON to YAML. Bidirectional conversion.

Convert TOML configuration files to JSON format.

Convert INI configuration files to JSON with sections as nested objects.

Check if a number is prime. See its factors, prime factorization, and nearby primes.

Generate Fibonacci numbers or check if a number belongs to the Fibonacci sequence.

Calculate factorials up to 1000! using BigInt. Shows steps and digit count.

Calculate nPr permutations and nCr combinations with formula display.

Calculate any side of a right triangle using the Pythagorean theorem. Visual triangle display.

Calculate EV from ISO, aperture, and shutter speed. Sunny 16 rule reference.

Calculate depth of field, near/far limits, and hyperfocal distance from lens settings.

Calculate maximum print size from image resolution at 300/150/72 DPI with quality rating.

Calculate golden ratio pairs. Visual spiral and rectangle display.

Upload an image and overlay a rule of thirds grid. Download with grid overlay.

Complete Instagram image size guide: post, story, reel, profile, carousel dimensions.

Facebook image size reference: cover, profile, post, event, ad dimensions.

LinkedIn image size guide: banner, profile, post, article cover dimensions.

YouTube image size reference: thumbnail, banner, profile, end screen dimensions.

X/Twitter image size guide: header, profile, post, card dimensions.

Generate random English words. Filter by length and starting letter.

Generate random English sentences for testing and placeholder text.

Generate realistic English paragraphs. Not lorem ipsum — real sentence structures.

Generate fake addresses with street, city, state, ZIP. US/UK/FR formats.

Generate random dates within a range. Multiple format options.

Convert HEX color codes to RGB values instantly. Large display, simple interface.

Convert RGB color values to HEX codes instantly. Simple, focused converter.

Convert Celsius to Fahrenheit instantly. Large display, dead simple.

Convert Fahrenheit to Celsius instantly. Large display, dead simple.

Convert kilograms to pounds and ounces instantly. Simple focused converter.

Calculate square footage from length and width. Add multiple rooms. Metric option.

Calculate cubic footage from L x W x H. Volume for shipping, storage, concrete.

Input radius, diameter, circumference, or area — calculate all others. Visual circle.

Calculate triangle area, perimeter, angles, and type from sides and angles.

Calculate cylinder volume, surface area, and lateral area from radius and height.

Generate C# classes with properties from JSON. Handles nested objects and arrays.

Generate Java POJOs from JSON. Getters/setters or record style.

Generate PHP classes with typed properties and constructor from JSON.

Generate Rust structs with serde attributes from JSON.

Convert CSV data to SQL INSERT statements. Custom table name, batch inserts.

Convert pounds to kilograms and back. Instant bidirectional unit converter.

Convert miles to kilometers instantly. Bidirectional, fast.

Convert kilometers to miles instantly. Bidirectional converter.

Convert inches to centimeters and back. Simple bidirectional converter.

Convert centimeters to inches and back. Instant bidirectional converter.

Convert feet to meters and back. Bidirectional unit converter.

Convert meters to feet and back. Instant bidirectional converter.

Convert ounces to grams and back. Simple bidirectional converter.

Convert grams to ounces and back. Instant bidirectional converter.

Convert gallons to liters. Supports US and UK (Imperial) gallons. Bidirectional.

Calculate sphere volume, surface area, diameter, and circumference from radius.

Calculate cone volume, surface area, and slant height from radius and height.

Calculate trapezoid area, perimeter, and median from parallel sides and height.

Calculate regular hexagon area, perimeter, apothem, and diagonal from side length.

Calculate ellipse area, circumference, eccentricity from semi-major and semi-minor axes.

Calculate Compound Annual Growth Rate from start value, end value, and number of years.

Calculate future or past purchasing power based on inflation rate and years.

Estimate retirement fund based on age, savings, monthly contributions, and return rate.

Calculate how long to pay off debt and total interest from balance, APR, and monthly payment.

Calculate down payment amount from property price and percentage, or reverse.

Count word frequency in text. Top 50 words with bar chart. Exclude common words option.

Convert text to binary representation and back. Instant encoding/decoding.

Convert text to hexadecimal encoding and back. Instant encoding/decoding.

Convert text to octal encoding and back. Instant encoding/decoding.

Count lines, blank lines, non-blank lines, and average line length in text.

All 148 CSS named colors with hex values. Search, filter by category, click to copy.

Common keyboard shortcuts for Windows, Mac, VS Code, Chrome, and Figma. Searchable.

Full ASCII table (0-127) with decimal, hex, octal, and character. Searchable.

Common Unicode characters: arrows, math, currency, symbols, emojis. Click to copy.

Common MIME types reference: extension to MIME type. 90+ entries. Searchable.

Convert cups to milliliters. US and UK cup sizes. Bidirectional conversion.

Convert milliliters to cups. US and UK sizes supported.

Convert tablespoons to milliliters and back. US, UK, and Australian sizes.

Convert teaspoons to milliliters and back. US, UK, and metric sizes.

Convert yards to meters and back. Includes common length references.

Convert meters to yards and back. Includes feet and inches breakdown.

Convert stones to kilograms and pounds. Popular UK weight unit.

Convert kilograms to stones and pounds. With stones + lbs breakdown.

Convert liters to US and UK gallons. Bidirectional with common presets.

Convert miles per hour to kilometers per hour and back. Speed limit presets.

Estimate monthly electricity bill from kWh usage and rate. Appliance presets included.

Estimate solar panel output from roof area, sun hours, and panel wattage.

Calculate pool volume in liters and gallons. Rectangular and circular shapes.

Calculate gravel needed from area and depth. Results in tons and cubic yards.

Calculate download time from file size and connection speed.

Calculate screen width and height from diagonal and aspect ratio. PPI from resolution.

Plan event budget by guests and cost per head. Category breakdown included.

Calculate number of steps and tread depth from floor height and riser height.

Calculate total photo printing cost by quantity and size.

Estimate wire length from spool weight and wire gauge.

Random yes or no answer. Animated coin-flip style with history.

Flip a virtual coin. Animated with crypto-random results and history.

Spin to pick a random number in a min-max range. Animated spinner.

Spin for a random color with hex code. Save favorites.

Generate random letters A-Z. Filter vowels or consonants.

Live countdown timer to January 1st. Days, hours, minutes, seconds.

Enter your birthdate and see your age on Mars (687-day Martian year).

Count days until any date. Presets for Christmas, Summer, and more.

Find today's ISO week number or the week number for any date.

Check if any year is a leap year. See nearby leap years.

Convert kilometers per hour to miles per hour and back. Speed presets included.

Convert US and UK pints to liters instantly.

Convert liters to US and UK pints.

Convert fluid ounces to milliliters with common size presets.

Convert milliliters to fluid ounces instantly.

Convert acres to hectares for land area measurement.

Convert hectares to acres for land area measurement.

Convert square feet to square meters for real estate and construction.

Convert square meters to square feet instantly.

Convert nautical knots to kilometers per hour.

Convert any date and time to Unix timestamp in seconds and milliseconds.

Convert a Unix timestamp to human-readable date in multiple formats.

Add or subtract business days from a date, excluding weekends.

Count how many times a specific weekday occurs between two dates.

Find which fiscal quarter any date falls in with progress tracking.

Calculate exactly how much time has elapsed since any past date.

Count working days remaining until a target date, excluding weekends.

Generate upcoming pay dates based on your pay schedule.

View moon phases for any month with emoji calendar grid.

Check compatibility between two zodiac signs with scores.

Calculate the sale price after a percentage discount.

Calculate the percentage increase from one value to another.

Calculate the percentage decrease from one value to another.

Calculate arithmetic mean and weighted average for a set of numbers.

Find the median value of a set of numbers with sorted list display.

Get a random emoji from various categories. Filter and copy.

Generate random passphrases with entropy display and customizable options.

Get a new motivational quote every day. Share and copy.

Get random dad jokes. New joke button, share and copy.

Random riddles with categories. Click to reveal the answer.

Convert bar pressure to PSI instantly with common presets.

Convert PSI pressure to bar instantly with common presets.

Convert watts to amps using voltage. Supports AC and DC circuits.

Convert amps to watts using voltage. Supports AC and DC circuits.

Convert horsepower to watts. Supports mechanical and metric HP.

Convert watts to horsepower. Supports mechanical and metric HP.

Convert BTU/h to watts for heating and cooling calculations.

Convert watts to BTU/h for HVAC and heating calculations.

Convert millimeters to inches with fractional inch display.

Convert inches (decimal or fractional) to millimeters.

Calculate daily food amount for your dog based on weight, age, and activity level.

Calculate daily food amount for your cat based on weight, age, and lifestyle.

Get watering schedule based on plant type, pot size, and season.

Log and track daily screen time with weekly view and goal setting.

Track daily habits with streak counter and calendar view.

Daily gratitude entries with calendar browsing. Saved locally.

Track daily mood with calendar heatmap and trend analysis.

Track birthdays with upcoming list and days-until countdown.

Organize groceries by category with check-off and text sharing.

Plan meals for the week with grocery list generation.

Escape special characters in text for use in regular expressions.

Parse URLs into protocol, host, port, path, query params, and hash.

Inspect JWT tokens: decode payload, check expiry, clock skew, and size.

Compare two JSON objects and see added, removed, and changed keys.

Escape text for safe use in SQL queries. Prevent injection.

Remove HTML tags and return plain text with optional formatting.

Generate Markdown table syntax from a visual grid editor.

Build HTTP headers with auth, content-type, and custom fields. Export as JSON or cURL.

Extract and format the payload from a JWT token as JSON.

Encode and decode text using Base32 encoding.

Convert cups to grams for common cooking ingredients like flour, sugar, butter, and rice.

Convert grams to cups for common cooking ingredients like flour, sugar, butter, and rice.

Convert calories (kcal) to kilojoules (kJ) for nutrition labeling and diet tracking.

Convert kilojoules (kJ) to calories (kcal) for nutrition labeling and diet tracking.

Convert megabits per second to megabytes per second for internet speed calculations.

Convert megabytes per second to megabits per second for internet speed calculations.

Convert light years to kilometers for astronomical distance calculations.

Convert nautical miles to kilometers for marine and aviation navigation.

Convert troy ounces to grams for precious metals like gold and silver.

Convert carats to grams for gemstones and precious stones.

Reverse any text string character by character. Create backwards messages instantly.

Remove duplicate lines from text. Keep first or last occurrence.

Sort text lines alphabetically, numerically, by length, or random shuffle.

Add line numbers to text with customizable format and padding.

Remove all blank and empty lines from text instantly.

Add a prefix and/or suffix to every line in your text.

Find and replace text with regex support. Shows match count and highlights.

Extract all URLs from text. Deduplicate and copy the list.

Extract all numbers from text with sum, average, and count statistics.

Count character frequency in text. Shows most and least common characters.

Enter bill and tip amount to find the tip percentage. Reverse tip calculator.

Calculate fuel efficiency in MPG or km/L from distance and fuel used.

Calculate usable carpet area from room dimensions minus furniture and fixtures.

Calculate how many wallpaper strips you need from wall and roll dimensions.

Calculate how much area a paint can covers based on size and coverage rate.

Convert currency amounts using a manual exchange rate. No API needed.

Calculate selling price from cost and markup percentage, or find the markup.

Calculate sales commission from sale amount and commission rate.

Calculate total pay with regular and overtime hours at 1.5x or 2x rate.

Calculate tax amount, tip amount, and grand total from subtotal, tax %, and tip %.

Paste text and a keyword to see density percentage, count, and prominence score.

Check your SEO title character count, pixel width estimate, and Google SERP preview.

Check your meta description character count, pixel width, and SERP preview.

Paste HTML and count H1-H6 tags. Shows hierarchy and flags SEO issues.

Word count, sentence count, paragraph count, read time, and keyword density.

Generate Open Graph meta tags HTML from title, description, and image URL.

Generate Twitter Card meta tags from title, description, and image URL.

Generate a canonical link tag from a URL with explanation of its SEO purpose.

Escape and unescape special XML characters like &, <, >, quotes.

Basic JavaScript variable renaming obfuscation. Educational, not security-grade.

Convert quarts to liters instantly with common presets.

Convert liters to quarts instantly with common presets.

Convert tablespoons to teaspoons. 1 tbsp = 3 tsp.

Convert teaspoons to tablespoons. 3 tsp = 1 tbsp.

Convert square yards to square meters instantly.

Convert square miles to square kilometers instantly.

Convert cubic feet to cubic meters instantly.

Convert cubic meters to cubic feet instantly.

Convert Celsius to Kelvin temperature instantly.

Convert Kelvin to Celsius temperature instantly.

Play Rock Paper Scissors against the computer with animated hands and score tracking.

Play Tic Tac Toe against a simple AI with win and draw detection.

Classic card matching game. Flip cards, match pairs. Timer and moves counter.

Type displayed text as fast as possible. Shows WPM live with leaderboard.

Remember and reproduce color sequences. Progressive difficulty like Simon Says.

Test your reaction time. Screen turns green, click fast. Average of 5 rounds.

Guess the number between 1-100 with higher/lower hints. Count your guesses.

Classic hangman with random words, category hints, and canvas drawing.

Unscramble jumbled words with difficulty levels, timer, and scoring.

Classic snake game with arrow key controls. Score tracking and increasing speed.

Convert CSS properties to Tailwind CSS utility classes instantly.

Convert HTML to JSX with attribute mapping, self-closing tags, and style objects.

Convert XML data to CSV table format. Parse elements into rows and columns.

Convert SQL CREATE TABLE statements to JSON schema with column types and constraints.

Find the closest Tailwind CSS color class for any hex color value.

Convert pixel values to percentages and back based on container width.

Convert pixels to em and rem units. Target px and parent px to em value.

Convert pixel values to vw and vh viewport units with device presets.

Visualize and manage z-index stacking order with a visual preview.

Generate CSS media queries with preset breakpoints and custom rules.

Check blood pressure category from systolic and diastolic values with reference chart.

Calculate how long to reach your target weight based on weekly loss or gain rate.

Calculate daily protein needs based on weight, activity level, and fitness goals.