A video converter for Mac that keeps your files on your Mac
FFmix is a local-first video converter for macOS. Drop in a MOV, MKV, WebM or AVI and get a clean MP4 — remuxed losslessly when the video is already H.264, or re-encoded at near-lossless quality when the codec has to change. It also pulls audio to MP3/WAV and makes GIFs. Everything runs on your Mac through the bundled ffmpeg engine.
What it converts
FFmix reads what ffmpeg reads. Common conversions and how it handles them:
| From | To | How FFmix does it |
|---|---|---|
| MOV (QuickTime / iPhone) | MP4 | Remux instantly if already H.264 (lossless); otherwise re-encode at CRF 20 |
| MKV | MP4 | Copy compatible streams without re-encoding; re-encode only what MP4 can’t hold |
| WebM (VP9 / AV1) | MP4 | Re-encode to H.264 or H.265 for universal playback |
| AVI (DivX / Xvid) | MP4 | Re-encode to modern H.264, fixing old-codec playback issues |
| Any video | MP3 / WAV | Extract the audio track, optionally normalize loudness |
| Any video | GIF | Palette-based (palettegen + paletteuse) for clean colors |
Built for real files
Already-compatible video is remuxed with -c copy and +faststart — no quality loss, done in seconds.
Outputs use -pix_fmt yuv420p and faststart so they play on old devices and start streaming immediately.
Convert a folder through the queue, or save the recipe and run it from a Finder right-click or the menu bar.
See the command, every time
A MOV→MP4 conversion that needs a real re-encode generates exactly this, and FFmix shows it to you before it runs:
ffmpeg -i input.mov -c:v libx264 -crf 20 -pix_fmt yuv420p -movflags +faststart -c:a aac -b:a 160k output.mp4When the source is already H.264, it switches to a lossless remux instead — ffmpeg -i input.mov -c copy -movflags +faststart output.mp4. Either way the output is written next to the original and never overwrites it.
When FFmix isn’t the right converter
- You’re on Windows or Linux — FFmix is macOS-only.
- You need to rip a DVD or Blu-ray with menus and chapters — that’s a different kind of tool.
- The source is DRM-protected — FFmix does not remove copy protection.
FAQ
Does converting a video lose quality?
Not necessarily. When the source video is already H.264, FFmix can remux it into MP4 without re-encoding — bit-for-bit identical and almost instant. When the codec must change, it re-encodes at near-lossless quality (CRF 20).
Is anything uploaded to convert it?
No. Conversion runs on your Mac through the bundled ffmpeg engine, so your files never leave the device and it works offline.
Can FFmix convert several files at once?
Yes. Drop in a batch and they run through the queue. Saved recipes also work from a Finder right-click or the menu bar.
Why convert to MP4 instead of MOV, MKV or WebM?
MP4 (H.264/AAC) plays on virtually every device, browser, editor and platform, so it’s the safest container for sharing and uploading. MOV is Apple’s, MKV and WebM are great containers but less universally accepted.
Unlimited local conversions on the free version · no account · nothing uploaded.