Social PresetsAspect Lock100% Private

How It Works

1

Upload Image

Drop a JPG, PNG, or WebP image.

2

Choose Size

Set custom dimensions, percentage, or pick a preset.

3

Download

Get your perfectly resized image.

Frequently Asked Questions

What resize modes are available?
Three modes: Custom dimensions (set exact width and height in pixels), Percentage (scale by a percentage of the original size), and Presets (ready-made sizes for Instagram, Facebook, YouTube, LinkedIn, and more).
How does aspect ratio lock work?
When enabled, changing the width automatically adjusts the height (and vice versa) to maintain the original proportions of the image. Disable it to stretch or squash the image to exact dimensions.
Why does this tool use multi-step halving?
When downscaling significantly (e.g., from 4000px to 500px), a single step can produce blurry or aliased results. Multi-step halving iteratively reduces the image by 50% until close to the target size, producing sharper results.
Which presets are available?
Instagram Post (1080x1080), Instagram Story (1080x1920), Facebook Cover (820x312), YouTube Thumbnail (1280x720), Twitter Header (1500x500), LinkedIn Banner (1584x396), HD (1920x1080), and 4K (3840x2160).
Are my images sent to a server?
No. All resizing is done in your browser using the Canvas API. Your images remain on your device.
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About Image Resizer

What this tool does

Image editing tools let you resize, crop, compress, rotate, flip, and add watermarks to your images. All operations happen in-browser using the HTML5 Canvas, so your photos stay on your machine and are never uploaded to any server.

Why use this tool

Preparing images for a website, social media post, or email attachment usually means opening a heavy editor like Photoshop. These tools give you the most common operations in a single click, without any installation, account, or subscription.

How it works

Each tool reads your image into a canvas element, applies the requested transformation (scale, crop region, rotation angle, compression level), and generates a new downloadable file. Batch mode processes multiple images with the same settings in sequence.

Pro tip

When resizing for the web, aim for 2x the display dimensions to look sharp on Retina screens, then compress at 75-80% quality. This gives you the best balance of sharpness and speed.

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Part of these workflows

Social Media Content Prep

3 steps

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