Convert an MP4 video to MOV (QuickTime) losslessly and locally - for Final Cut Pro, iMovie and other Apple tools. No upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Some Apple-native editing programs like Final Cut Pro or older iMovie versions, as well as certain automated QuickTime workflows, explicitly expect the .mov file extension - even when the picture content would technically be identical to an MP4. MOV is not some exotic special case here: Apple's QuickTime File Format is historically the very foundation the MP4 standard itself was built on.
Because MOV and MP4 are so closely related, an MP4's H.264, H.265 or AAC content practically always fits perfectly into MOV's lossless copy set - this conversion is therefore almost always a pure, instant repackage, not a re-encode.
At its core, this is therefore a pure container/extension swap for tools that check the file extension rather than the actual content. Everything runs locally in the browser, with your video never uploaded.
| Input formats | MP4, M4V |
|---|---|
| Output format | MOV |
| Batch processing | No |
| Processing | Locally in your browser (WebCodecs) |
| File upload | None |
Limitations: Typically a lossless repackage with no quality loss, finishing in seconds. If the MP4 contains a very unusual codec, the tool re-encodes in the rare exception case. One file per run, ~1 GB limit (4 GB/tab in the browser).
No, the entire conversion happens locally in your browser.
Normally no - MP4 to MOV is practically always a lossless repackage.
Some Apple editing programs or automated QuickTime workflows explicitly expect the .mov extension.
No, during the typical lossless repackage the content is byte-identical - only the wrapper changes.
Yes, use the sibling tool "Convert MOV to MP4".