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Caesium Image Compressor

Caesium Image Compressor is a free, open-source desktop utility for Windows, macOS and Linux. Caesium is an image compression software that helps you store, send and share digital pictures, supporting JPG, PNG, WebP and TIFF formats. It has 6,447 GitHub stars and is released under the GPL-3.0 license.

github.com/Lymphatus/caesium-image-compressor (opens in a new tab)

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About Caesium Image Compressor

Try it directly on browser at caesium.app Caesium is an image compression software that helps you store, send and share digital pictures, supporting JPG, PNG and WebP formats. You can quickly reduce the file size (and resolution, if you want) by preserving the overall quality of the image.

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FAQ

Caesium Image Compressor FAQ

Still curious? Email info@appsgit.com.

Is Caesium Image Compressor free and open source?

Yes. Caesium Image Compressor's source code is public on GitHub under the GPL-3.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.

How do I install Caesium Image Compressor?

Download the installer for Windows, macOS and Linux from its GitHub Releases page (latest: v2.8.5) or the project website.

Is Caesium Image Compressor still maintained?

The repository's most recent commit was on Oct 5, 2026. appsgit only lists apps whose repository had a commit in the last six months.