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