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Formatters, minifiers, encoders, decoders, and data converters for developers.
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.
Convert CSV data to JSON and JSON to CSV format online.
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.
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.
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.
Convert pixels to rem units and back. Configurable base font size with a reference table.
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.
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.
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.
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.
Input multiple cron expressions and view next 10 run times for each, overlaid on a visual timeline.
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.
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.
Encrypt and decrypt text with AES-GCM using Web Crypto API. Password-based real encryption.
Detect screen resolution, viewport size, pixel ratio, color depth, orientation, and touch support.
Check color contrast ratio for WCAG AA and AAA compliance. Suggests closest passing colors.
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.
Translate cron expressions to plain English and vice versa. Bidirectional cron schedule translator.
See a hex color and guess which option matches. Score, streak, and a fun way to learn color 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 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.
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.
Read barcodes from images or camera. Supports EAN-13, UPC-A, Code128, QR codes.
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.
Encode and decode Base58 (Bitcoin alphabet). Used in cryptocurrency addresses and other applications.
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.
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.
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.
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.
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.
Validate crypto wallet address format for Bitcoin (Legacy, SegWit, Bech32), Ethereum, Litecoin, and Solana.
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.
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.
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.
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.
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.
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.
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.
Escape and unescape special XML characters like &, <, >, quotes.
Basic JavaScript variable renaming obfuscation. Educational, not security-grade.
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.
Convert Fahrenheit to Kelvin instantly. Formula shown, presets included.
Convert Kelvin to Fahrenheit instantly. Formula shown, presets included.
Convert Miles to Meters instantly. Accurate conversion with formula.
Convert Meters to Miles instantly. Accurate conversion with formula.
Convert Feet to Inches instantly. Simple, fast, free.
Convert Inches to Feet instantly. Simple, fast, free.
Convert Feet to Centimeters instantly. Accurate conversion.
Convert Centimeters to Feet and Inches. Accurate conversion.
Convert Milligrams to Grams instantly. Fast, free, no signup.
Convert Grams to Milligrams instantly. Fast, free, no signup.
Convert US shoe sizes to EU sizes for men and women. Lookup table.
Convert kilograms to grams instantly.
Convert grams to kilograms instantly.
Convert metric tons to kilograms.
Convert kilograms to metric tons.
Convert kilometers to meters instantly.
Convert meters to kilometers instantly.
Convert centimeters to millimeters.
Convert millimeters to centimeters.
Convert hours to minutes.
Convert minutes to hours and minutes.
Paste JSON and check if it is valid. Shows error position.
Check HTML for unclosed tags and missing quotes.
Check CSS for basic syntax errors.
Validate email format and show local/domain parts.
Validate phone number format by country.
Validate credit card numbers with Luhn check. Detect card type.
Validate ISBN-10 or ISBN-13 checksums.
Validate URL format and see protocol, host, path, query parts.
Validate IPv4 and IPv6 addresses. Show version and class.
Validate MAC address format. Normalize to colon or dash.
Check if a string is valid hexadecimal. Show decimal equivalent.
Paste JSON and a JSONPath expression to see matched results.
Complete reference for CSS units: px, em, rem, vw, vh, and more.
All CSS named colors grouped by hue. Click to copy hex code.
Common HTML tags with category, description, and examples.
JavaScript array methods reference with examples.
JavaScript string methods reference with examples.
Convert binary numbers to decimal with step-by-step breakdown.
Convert decimal numbers to binary representation instantly.
Convert hexadecimal values to binary representation.
Convert binary numbers to hexadecimal representation.
Convert octal (base-8) numbers to decimal (base-10).
Convert tabs to spaces (2/4/8) and reverse.
JSON object to escaped string for embedding in code.
Pick a color and get hex, RGB, and HSL values.
Visual tool to pick CSS gradient direction values.
Input margin/border/padding/content sizes, see visual box model.
Preview URL at mobile, tablet, and desktop widths.
Convert gigabytes to megabytes.
Convert megabytes to gigabytes.
Convert terabytes to gigabytes.
Convert gigabytes to terabytes.
Convert kilobytes to bytes.
Convert bytes to kilobytes.
Convert megabytes to bytes.
Convert bits to bytes.
Convert bytes to bits.
Convert megahertz to gigahertz.
Convert gigahertz to megahertz.
Learn how to calculate your exact age in years, months, and days. Covers age calculation methods, leap year handling, and practical uses for age data.
A practical guide to trimming audio files in your browser. Covers supported formats, trimming techniques, and tips for clean cuts without quality loss.
Learn how to create barcodes for products, inventory, and labels. Covers barcode types (EAN, UPC, Code 128), formatting options, and free generation tools.
Understand Body Mass Index, how it is calculated, what the categories mean, and the limitations of BMI as a health metric. Free online BMI calculator included.
Master CSS border-radius from simple rounded corners to complex organic shapes. Covers shorthand syntax, elliptical radii, and common design patterns.
A practical guide to designing business cards that make an impression. Covers layout principles, typography, print specs, and free online design tools.
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Images, PDFs, video, audio, text, code, calculators, SEO, and more. All free, all in your browser.
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