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Converting media on a Mac, the right way.
Straight-talking guides for turning HEIC into JPG, MKV into MP4, RAW into TIFF, and video into MP3 or GIF — all on your Mac with Zumkor, no cloud, no subscription.
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How to compress a video to email it on Mac (2026 guide)
Video too big for Gmail or Outlook? Compress it on your Mac to fit the 25 MB limit — with QuickTime, ffmpeg, or Zumkor. Offline, no upload, no quality guesswork.
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How to convert HEIC to JPG on Mac (batch, offline, 2026)
Convert HEIC photos to JPG on your Mac — one file or a whole folder — with Preview, sips, Finder Quick Actions, or Zumkor. Fully offline, no upload.
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How to convert MKV to MP4 on Mac without losing quality
Convert MKV to MP4 on your Mac without re-encoding — remux with ffmpeg for zero quality loss, or drag-and-drop with Zumkor. Offline, batch, no upload.
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Convert it yourself, right on your Mac.
One-time $19.99. Batch whole folders, 100% offline, nothing uploaded.