Convert MOV to WebM
From camera roll to web page — MOV re-encoded to the open format on your own device.
Drop your video or audio here
or
MP4, MOV, WebM, MKV, AVI, MP3, WAV and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
MOV files come from cameras — iPhones, Macs, screen recordings — and WebM is where video goes to live on web pages: open, embeddable, playable in every current browser without a player library. This conversion is the direct route between those two worlds.
The video and audio re-encode into WebM's open codecs (VP9 and Opus on most browsers), entirely in your browser — personal footage never uploads anywhere. Re-encoding takes real time on long recordings; for a quick share to chat apps, MP4 is the faster conversion, since iPhone footage usually repacks into it instantly.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Convert
Compatible files are repackaged instantly with zero quality loss; others are hardware-transcoded at high quality.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
Should I convert my iPhone video to WebM or MP4?
WebM for embedding on web pages and open platforms; MP4 for everything else — chat apps, TVs, editing. MOV to MP4 is usually an instant lossless repack, while WebM is a full re-encode, so let the destination decide.
Does the quality survive the re-encode?
Yes for normal viewing — the high-quality setting used here preserves what the camera captured to the eye. As with any re-encode, avoid converting the same file back and forth repeatedly.
Is my personal video uploaded during conversion?
No — the file is decoded and re-encoded on your own device, in your browser. Nothing is sent to any server at any point.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.