Caesium Image Compressor
Caesium Image Compressor compresses JPG, PNG, WebP, and TIFF pictures for storage, sending, and sharing.
About Caesium Image Compressor
Caesium Image Compressor is open source desktop software for reducing the file size of digital pictures so they are easier to store, send, and share. It supports JPG, PNG, WebP, and TIFF formats. Users can reduce file size and, if they choose, image resolution, while aiming to preserve the overall quality of the image.
The project publishes Windows installer and portable versions, a macOS DMG package, and Linux source code, with binaries available from third-party builds. Windows 10 (build 1809 or later), macOS 12 or later, and Linux are listed as supported platforms, and only 64-bit versions are supported. The Linux version was tested on Ubuntu 22.04 and Manjaro. The source is licensed under GPL-3.0.
Key features
- Compresses JPG, PNG, WebP, and TIFF image files
- Reduces file size while aiming to preserve overall image quality
- Optional reduction of image resolution
- Windows installer and portable versions
- macOS DMG package
- Interface translations in multiple languages, with varying completeness
Best for: People who want to shrink JPG, PNG, WebP, or TIFF pictures on Windows, macOS, or Linux, and developers who want to build the software from source.
Good for
- Open source under the GPL-3.0 license
- Offers both installer and portable versions for Windows
- Interface available in many languages
Watch out for
- Only 64-bit versions are supported
- Windows 7 and 8 are not supported in version 2; the older v1.x line is listed for those systems
- The main branch can contain unstable code, so a tagged version is recommended for building from source
Caesium Image Compressor at a glance
- Category
- Online Tools › Image Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Caesium Image Compressor FAQ
Which platforms are supported?
Windows 10 (build 1809 or later), macOS 12 or later, and Linux are listed. Only 64-bit versions are supported. Linux was tested on Ubuntu 22.04 and Manjaro.
Where can I download Caesium?
Downloads are listed on the project's releases page. Windows has installer and portable versions, macOS has a DMG package, and Linux users can compile the source code or use a binary from a third-party build.
How can I report a problem or request a feature?
The project asks users to open an issue on its GitHub repository.
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