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GoogleChromeLabs/squoosh

A browser-based image compressor that shrinks images across many formats entirely on your device, with no upload to a server.

Open-source alternative to:TinyPNG

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Open issues
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Last commit
16 days ago

What is it?

Squoosh is a web app for making images smaller. You open an image in the browser, choose a codec and its settings, and compare the original with the compressed output before saving the result. It supports a range of image formats and codecs.

Compression happens locally in the browser, so images are not sent to a server. The project uses Google Analytics to collect basic visitor data and before-and-after file sizes; installed PWA users also have their installation type and date recorded.

The codebase is written in TypeScript. Developers can clone the repository, install dependencies with npm, and run a build or local dev server to work on the app.

Key features

  • 01Compresses images in the browser without uploading them to a server.
  • 02Lets you compare the original and compressed image side by side.
  • 03Supports multiple image formats and codecs.
  • 04Can be installed as a Progressive Web App.
  • 05Open source under the Apache-2.0 license.

Use cases

  • Reducing image file sizes before publishing them on a website or blog.
  • Compressing photos for email or messaging without sending them to a third-party service.
  • Testing how different codecs and quality settings affect image size.

Quick start

  1. 1

    Clone the repository

  2. 2

    Install node packages

    npm install
  3. 3

    Build the app

    npm run build
  4. 4

    Start the development server

    npm run dev

Things to know

  • Google Analytics collects visitor data and image size values, despite local compression.

Topics

#image-compression#webassembly#browser#pwa#typescript#image-optimization

FAQ

What is squoosh?
A browser-based image compressor that shrinks images across many formats entirely on your device, with no upload to a server. Squoosh is a web app for making images smaller. You open an image in the browser, choose a codec and its settings, and compare the original with the compressed output before saving the result. It supports a range of image formats and codecs.
Is squoosh free to use? What license does it have?
squoosh is open source under the Apache-2.0 license. Check the license terms before using it in commercial products.
Is squoosh still maintained?
Actively maintained. The last commit to squoosh was on Oct 22, 2026.
What can I use squoosh for?
Reducing image file sizes before publishing them on a website or blog. Compressing photos for email or messaging without sending them to a third-party service. Testing how different codecs and quality settings affect image size.
How do I install squoosh?
Clone the repository Install node packages: npm install Build the app: npm run build Start the development server: npm run dev
Where can I get squoosh?
The source code and installation instructions are on GitHub: https://github.com/GoogleChromeLabs/squoosh

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