# MOV to MP4 converter: free, in your browser, no upload

> Convert MOV to MP4 in your browser. iPhone videos and Mac screen recordings move into MP4 without re-encoding, so there's no quality loss, and HEVC can become H.264 for older players. Nothing is uploaded.

URL: https://cutfac.com/tools/mov-to-mp4  
Last updated: 2026-10-28  
Language: [한국어](https://cutfac.com/ko/tools/mov-to-mp4)

Drop in a MOV from an iPhone, QuickTime or a screen recording and get an MP4. Most MOVs move over without re-encoding, so it takes seconds and loses nothing. The file never leaves your browser.

Runs in your browser. Nothing is uploaded.

## How to use it

1. **Add a MOV.** Drop the file. The tool reads which video and audio it holds and shows what will happen to each.
2. **Choose H.264 if you need it.** An iPhone video recorded in HEVC can stay HEVC, which is fast, or become H.264 for players that can't open HEVC.
3. **Convert and download.** Play the MP4 to check it, then download it.

## Why it's usually instant

MOV and MP4 are containers: boxes around the video and audio. An iPhone or a Mac screen recording puts H.264 or HEVC video and AAC audio in the MOV box, and MP4 holds exactly those. So the tracks move into an MP4 box as they are, with nothing decoded or encoded again. The MP4 comes out about the same size as the MOV, with the same picture.

The tool also moves the MP4's index to the front of the file, so it starts playing in a browser or chat app before it has fully downloaded.

## HEVC or H.264

iPhones that capture in High Efficiency (Settings > Camera > Formats) record video as HEVC; Most Compatible records H.264. HEVC plays on recent iPhones, Macs and Android phones, and on Windows once Microsoft's HEVC Video Extensions are installed. Older players, some editors and some upload forms only take H.264.

Switch on Convert HEVC to H.264 for those. The video is then encoded frame by frame, which takes longer and makes the file larger than HEVC at the same quality.

## With ffmpeg

The same two paths on the command line:

- Move the tracks without re-encoding: ffmpeg -i input.mov -c copy output.mp4
- Encode the video to H.264: ffmpeg -i input.mov -c:v libx264 -crf 20 -c:a aac output.mp4

## Sources

- [Apple Support: Using HEIF or HEVC media on Apple devices](https://support.apple.com/en-us/116944)
- [FFmpeg documentation](https://ffmpeg.org/ffmpeg.html)

## Questions

### Is my video uploaded?

No. The MOV is read and the MP4 is written in your browser. Nothing is sent anywhere.

### Does converting MOV to MP4 lose quality?

Not when the tracks are copied, which is the case for most iPhone videos and screen recordings. Only encoding, such as turning HEVC into H.264, re-compresses the picture, and it's set to high quality.

### Why is my MP4 still HEVC?

HEVC is copied as it is unless you switch on Convert HEVC to H.264. Copying is instant and keeps the file small; switch it on only if something can't play HEVC.

### How big a file can I convert?

The MP4 is built in your browser's memory, so a video of a few gigabytes may not fit. For files that large, use the ffmpeg command in the guide above.

### What about ProRes MOVs?

ProRes isn't something MP4 players take, so it has to be encoded to H.264, and most browsers can't decode ProRes. For a ProRes file, use the H.264 ffmpeg command in the guide above.