MediaOptim compresses images, videos, and audio files directly on your Mac — no uploads, no subscriptions, no privacy risk. Most compression tools send your files to a server. MediaOptim runs everything locally using native Apple frameworks, so files never leave your device. ✓ Batch compress entire folders ✓ Supports HEIC, WebP, MP4, MOV, MP3, FLAC and more ✓ Set quality targets, not just percentages ✓ Works offline, always