Is my MOV uploaded to a server?

No. The conversion runs in your browser with WebCodecs. Your MOV never leaves your device. Fast, private, no upload, no watermark.

Will I lose quality converting MOV to MP4?

MOV and MP4 are close cousins. If your MOV already uses H.264, the video is copied straight into the MP4 with no re-encoding, so it's visually identical. Other codecs get re-encoded to H.264, a normal lossy step you usually won't notice.

It says my browser can't encode H.264. What now?

MP4 needs an H.264 encoder when re-encoding is required. Chrome and Edge have one. Firefox does not. Open this page in Chrome or Edge and try again.

MOV to MP4

If your MOV is already H.264/AAC, the streams copy straight across. No re-encode, no quality loss.

What this does

Convert QuickTime MOV video to MP4. When your MOV is already H.264/AAC the streams copy straight across with no re-encode; other codecs are re-encoded to H.264. The whole thing runs in your browser with WebCodecs.

How it works

1Drop your QuickTime MOV video or pick it from your device.
2Hit Convert to MP4 and watch the progress bar.
3Download the MP4. It's smaller, universal, and ready to upload anywhere.

Built with open source

Mediabunny — Converts and edits video and audio in the browser via WebCodecs. Add-on encoders cover MP3, AAC, and FLAC. · MPL-2.0

Frequently asked questions

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