Caesium – Quickly Convert And Compress Images In Batch

Caesium is a free software for compressing pictures without reducing their quality. It can reduce the size of your picture up to 90%, preserving the original quality. It allows you to save a lot of space and easily upload your pictures on the web in a moment. The software is user-friendly with a simple and clear interface.

The compression level can only be manually selected form JPG, whereas, PNG and BMP images are auto compressed. Caesium supports drag and drop, so you can add images either from the button from top or by using drag and drop functionality.


The image preview option can be used to  preview images to see how they will look like after compression.


Once the images are added, click Convert to compress the images.


You can open the output folder, get an image preview (before conversion), clear queue list, open input folder and add pictures from both the top buttons and right-click menu.

Context Menu

Caesium is an open source application hosted at source forge. It works on

  • Windows XP
  • Windows Vista
  • Windows 7

Download Caesium