Smolr is a free, open-source macOS app that compresses and converts images to modern formats like WebP, AVIF, and JPEG XL.
- Compress images with quality control
- Convert to WebP, AVIF, JPEG XL from PNG, JPEG, GIF, WebP, AVIF, JPEG XL
- Batch process multiple files at once
- Quality slider for precise control (50-100%)
- Strips metadata to reduce file size
- 100% local processing
- No subscriptions, no ads, no tracking
- Open source
- Simple drag & drop interface
