Y4M to MOV converter
Convert Y4M to MOV in seconds, free and unlimited. No upload, no sign-up, no watermark: your video never leaves your device.
Last updated
Quick answer: To convert Y4M to MOV, add the Y4M file to the iHateFiles Y4M to MOV converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. Y4M is a format most software has stopped opening. MOV is not.
Should you convert Y4M to MOV?
Yes. Y4M is a format most current software no longer opens, so converting it is the reliable way to keep watching it. MOV is a reasonable target; MP4 is the safest.
The picture is re-encoded
A Y4M usually holds completely uncompressed frames with no sound. This writes H.264 video with AAC sound into the MOV. The source is uncompressed, so this is the first and only round of loss.
There is no sound to carry
A Y4M carries no audio track, so the MOV comes out silent. If the sound exists as a separate file, add it afterwards with the Replace Audio tool.
Expect a smaller MOV
H.264 video is a much more efficient codec than what a Y4M holds, so at the same visual quality the MOV is usually a third to a half of the size.
Where the MOV will play
MOV plays on every Apple device, Windows 10 and later, and most editors.
Y4M and MOV side by side
| Y4M | MOV | |
|---|---|---|
| Inside the file | completely uncompressed frames with no sound | H.264 video with AAC sound |
| Compression | Lossless | Lossy |
| Carries sound | No | Yes |
| Plays on | Needs converting first | every Apple device, Windows 10 and later, and most editors |
| Here | Read only | Read and write |
What usually goes wrong
About the Y4M. A few seconds of Y4M can be larger than a whole film in MP4. That is the format doing its job.
About the MOV. A MOV recorded on an iPhone is usually H.264 or HEVC and plays anywhere. A MOV exported from an editor may be ProRes, ten times larger, and rejected by the same places.
How to convert Y4M to MOV
- Add your Y4M file. It is read from your disk and stays there.
- Check the settings. The output format is already set to MOV.
- Press convert and the MOV file is saved back to your device.
MOV converter: everything that converts to MOV
Questions
How do I convert Y4M to MOV?
Open this page, add your Y4M file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this Y4M to MOV converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to MOV lose quality?
MOV is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several Y4M files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.