Caesium Image Compressor

Compress your pictures up to 90% without visible quality loss

Caesium is a free software developed for simplicity and effectiveness.

Caesium is one of the most popular image optimization software available helping photographers, bloggers, webmasters, businesses or casual users at storing, sending and sharing digital pictures.


Image Compressor

Providing a simple yet effective interface with a real-time preview and multiple image processing at the same time, everyone will be able to reach the best result. Advanced users will find extra features, like metadata storing options or folder structure support.


Command Line Tool

If you are working on Linux or MacOSX and want to be geeky, you can use the Command Line Tools, which are the pulsing heart of Caesium. You can compress images with advanced tools very quickly. It works on the command line!

Github Code

Online Compressor

Just have a few bunch of images to compress and you don't want to download a dedicated software to accomplish the task? Do it online!

Online Compressor


Select the right version for you

Windows 10 (build 1809) or later
Installer Download Alternative mirror
Portable Download Alternative mirror
macOS (10.15+)
DMG Download Alternative mirror
Mirror are hosted on
Old releases at Github


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