The Browser AI

image compression

Image compression

Reduce image size while maintaining visual quality, suitable for web pages and social sharing. Based on the Squoosh open source browser-side WASM codec implementation, images are only processed locally and will not be uploaded to any server.

Loading image compression tool...

What is image compression suitable for?

Image compression is ideal for reducing file size before publishing a web page, sending an email, or sharing images on social media. The tool decodes the image in the browser and outputs JPEG, PNG or WebP using the WebAssembly encoder based on Squoosh. Original files and compression results will not be uploaded to The Browser AI servers.

JPEG and WebP support lossy compression: stronger compression generally results in smaller files, but the loss of detail increases. The PNG uses lossless encoding, so adjusting the image quality won't produce the same volume change as the JPEG. Inputs that can be decoded by the browser, such as GIF, will be output to the selected static format, and animation will not be preserved.

Supported formats: JPG, PNG, WebP, GIF; single file limit: 30MB.

How to use image compression

  1. Step 1

    Select picture

    Upload an image no larger than 30MB, and the tool will read it locally and display a preview.

  2. Step 2

    Adjust compression parameters

    Select JPEG, PNG or WebP and set the compression strength; parameters will be reprocessed after changes.

  3. Step 3

    Check and download

    Compare the image and file size before and after compression, confirm the effect and then download the result.

FAQ

Will image compression reduce image quality?

Lossy compression in JPEG and WebP may reduce detail. It is recommended to start with the default strength and decide whether to continue to increase the compression strength based on the before and after comparison on the page. PNG output is lossless encoding.

Will the image be uploaded to the server?

No. Image decoding, encoding and previewing are all completed in the current browser, and the page will not send the original file to The Browser AI servers.

Why might compressed images be larger?

The size depends on the original image encoding, size, target format and content complexity. Already highly optimized images may not become smaller after re-encoding, and the PNG lossless output may be larger than the lossy original image.

Technology and data sources

  • JSquash — The browser-side image codec project used by this tool.
  • Squoosh codecs — The open source image tools and codecs that the JSquash codec implementation is based on.