Caesium Image Compressor

About

Caesium Image Compressor is a free and open-source image compression and optimization tool developed in Italy, available for Mac, Windows (including a portable version), and online, with a command-line interface also offered for Linux. Its core product allows users to compress pictures by up to 90% without visible quality loss, featuring a simple interface with a real-time preview and simultaneous multiple image processing. Key features include image optimization, resizing, batch processing, drag and drop functionality, batch file renaming, multiple language support, and a dark mode, all within a lightweight, portable application that works offline and requires no registration. While praised for its efficiency and ease of use, user feedback indicates it may lack some advanced settings found in competitors like Riot, and some users have noted the absence of an 'undo' option and issues with EXIF data preservation. The project maintains an active presence on GitHub, Facebook, and Twitter.