MOV to WEBM converter
Convert MOV to WEBM in seconds, free and unlimited. No upload, no sign-up, no watermark: your video never leaves your device.
Last updated
Quick answer: To convert MOV to WEBM, add the MOV file to the iHateFiles MOV to WEBM 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. An open, royalty-free format that browsers play natively.
Should you convert MOV to WEBM?
Do this when something specifically needs WEBM. The picture is re-encoded, so it costs a little quality; if all you need is a file that plays everywhere, MP4 is usually the better target.
The picture is re-encoded
A MOV usually holds H.264, HEVC or ProRes video, usually from an iPhone or a Mac. This writes VP8 video with Vorbis sound into the WEBM. Both sides are compressed with loss, so this is a second generation: leave the quality at its default or higher, because the encoder is working from MOV artefacts rather than the original.
Extra tracks may not survive
A MOV can carry several audio tracks. WEBM is more limited, so this conversion keeps the main video and the first audio track. If you need the subtitles, save them first with Extract Subtitles.
Where the WEBM will play
WEBM plays on every modern browser and Android, but not QuickTime or older iPhones.
MOV and WEBM side by side
| MOV | WEBM | |
|---|---|---|
| Inside the file | H.264, HEVC or ProRes video, usually from an iPhone or a Mac | VP8 video with Vorbis sound |
| Compression | Lossy | Lossy |
| Carries sound | Yes | Yes |
| Plays on | every Apple device, Windows 10 and later, and most editors | every modern browser and Android, but not QuickTime or older iPhones |
| Here | Read and write | Read and write |
What usually goes wrong
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.
About the WEBM. A browser screen recording is usually a WEBM with a broken duration, so players show it as zero seconds or refuse to seek. Converting it to MP4 rewrites the header and fixes the seeking.
How to convert MOV to WEBM
- Add your MOV file. It is read from your disk and stays there.
- Check the settings. The output format is already set to WEBM.
- Press convert and the WEBM file is saved back to your device.
Questions
How do I convert MOV to WEBM?
Open this page, add your MOV 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 MOV to WEBM 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 WEBM lose quality?
WEBM 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 MOV files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.