How to use the mov to mp4 converter
- 1
Select your file
Drag a file onto the box or click to browse. It stays on your device, nothing is uploaded.
- 2
Click Convert to MP4
FFmpeg runs in your browser. The first run also downloads the FFmpeg core, so it takes a little longer.
- 3
Download the MP4
When it finishes, download the MP4 file. Re-run with another file any time.
Lossless remux when possible
MOV files recorded by iPhones, Macs, and most cameras use H.264/AAC, which MP4 also supports. The converter first tries a stream-copy remux (-c copy), so the original video and audio are repackaged without re-encoding, fast and quality-preserving. If a MOV uses a codec MP4 cannot carry, it automatically falls back to re-encoding with H.264/AAC.
Why convert MOV to MP4
MP4 plays on virtually every device, browser, editor, and social platform, while MOV is best supported in Apple's ecosystem. Converting to MP4 makes a clip portable for Windows, Android, web embedding, and upload targets that reject .mov, without sending your footage to a third-party server.
Frequently asked questions
Is the MOV to MP4 converter free?
Yes. It is completely free with no ads, sign-up, or watermark, and it runs entirely in your browser.
Is my video uploaded to a server?
No. The file is read and converted locally with FFmpeg WebAssembly. Nothing leaves your device.
Will converting reduce the quality?
Usually not. Standard H.264/AAC MOV files are remuxed without re-encoding, so quality is preserved. Only files needing a codec change are re-encoded.
Is there a file size limit?
There is no hard limit, but very large files use more memory and take longer because everything is processed in the browser.