Caesium is a multiple award winning software developed for simplicity and effectiveness.

With more than one million worldwide downloads, 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.


Caesium Image Compressor

Image compression up to 90% for Windows

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.

CaesiumPH Beta

Lossless JPEG optimization for PHs

CaesiumPH can reduce the size of your pictures without losing any quality. Every pixel will remain the exact same as before the compression, so you can save space for your HD photos without worries. With native support for Windows, MacOSX and Linux.

CaesiumCLT Beta

Command Line Tools for advanced users

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 JPEG and PNG with advanced tools very quickly. It also works on Linux servers.

Caesium App Beta

Image compression for mobile devices

Everybody wants to share their pictures, but sometimes it takes just too much time. Send them compressed and save a lot of time and bandwidth. Soon available for Android, iOS and Windows Phone.

Caesium Online Beta

Compress your pictures online

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!



Product Version Description Link
Installer 1.7.0 Windows installer. Default option. Download
Portable 1.7.0 Windows portable version for USB drives. Download
Source Code 1.7.0 Source code for developers Download
Caesium downloads are hosted by fosshub
Alternative downloads on Sourceforge


Product Version Description Link
Windows 0.9.5 Windows installer Download
MacOSX 0.9.5 MacOSX .dmg package Download
Source Code 0.9.5 Source code for Linux and developers Download
More on GitHub


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