Caesium Image Compressor
Caesium Image Compressor is a free, open-source image optimization tool that reduces file sizes of JPEG, PNG, and WebP images while preserving visual quality. It offers both lossy and lossless compression modes, batch processing of multiple images, resizing, format conversion, and metadata preservation. The app is available as a desktop GUI, command-line tool, and web-based version, making it suitable for photographers, web developers, and anyone needing to optimize images for storage or faster uploading.
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1 suggestionCaesium has already shipped a native Apple Silicon build — the vendor's current macOS version includes full ARM64 support alongside x86_64, so you may already be running it natively. If your installed copy is an older build, the simplest way to confirm and upgrade is to visit the official GitHub releases page at github.com/Lymphatus/caesium-image-compressor, where you can download the latest macOS app directly. The binary includes native Apple Silicon support, so after installing the newer version, the app will run natively on M-series Macs without any additional steps. No beta channel or special configuration is needed — the main download already ships with universal architecture support.
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