MOV Compressor — Compress QuickTime Files Online Free
iPhone and Mac MOV exports are huge — a 1-minute 4K iPhone clip is over 500 MB. This compressor shrinks them with CRF re-encoding while keeping the QuickTime container intact for Apple workflows.
Drag & drop your video here, or click to browse
Max file size: ~2 GB (memory permitting)
Why use this MOV Compressor?
- iPhone MOV exports balloon to 500 MB / minute at 4K — compression cuts that 5–10×.
- CRF re-encoding is content-aware: complex scenes get more bits, simple scenes get fewer.
- Output stays MOV by default, but you can switch to MP4 in one click.
- Local processing — keeps unreleased footage off third-party servers.
How to use it
Drop the MOV onto the compressor
iPhone, screen recordings, and Final Cut Pro exports all work.
Pick a CRF value
CRF 23 = visually lossless and roughly halves file size on iPhone exports. CRF 28 cuts size by another 40%.
Download the smaller MOV
Re-imports cleanly into Final Cut Pro, iMovie, and DaVinci Resolve.
What to watch out for
| ProRes is meant to be large | If the MOV is ProRes, it is uncompressed by design and converting to H.264 is the compression. Expect a very large reduction. |
|---|---|
| Check the result on a big screen | MOV files are usually camera or editing masters. Compression artefacts that vanish on a phone are obvious on the monitor the footage was graded on. |
| The output is MP4 | H.264 in MP4 is what plays everywhere. If you need it to stay a MOV for an Apple workflow, this is the wrong step. |
FAQ
Will the compressed MOV still work in Final Cut Pro?
Yes — output stays in the QuickTime container with H.264 video, the most editor-friendly combination.
Should I convert to MP4 instead?
If the destination is web / Android / older Windows, converting to MP4 is more universal. For Apple-only workflows, keeping MOV avoids a re-import step.
Does this run in my browser?
Yes — the tool uses FFmpeg compiled to WebAssembly. Your file never uploads to a server, never leaves your device, and there is no signup or watermark.