MOV to MP4 — in your browser
iPhones record in MOV. Most of the rest of the world plays MP4. Drop a .mov here to convert it.
drop a video here
or click to choose
Why convert MOV to MP4?
iPhones and Apple cameras record in .mov — QuickTime's container format. The actual video codec inside is usually H.264 or HEVC, which is the same thing MP4 holds. So converting MOV to MP4 is almost always just a container swap, not a re-encoding. It plays everywhere MP4 plays: Windows Media Player, VLC, Premiere, Final Cut, YouTube, every Android phone, every smart TV.
How this tool works
We rewrap your .mov into an .mp4 container with H.264 video and AAC audio. The result is a file the same size or slightly smaller, with identical visual quality.
Why not just rename the file?
You can rename video.mov to video.mp4 sometimes and it'll play. But it doesn't always — MOV can hold codecs (like ProRes) that MP4 doesn't formally support, and editors will reject the renamed file. A real conversion is safer.
FAQ
Does this work on iPhone?
Yes. Open this page in Safari, pick a video from your library, hit Convert, then save the result back to Files or Photos.
Will I lose quality?
Pick "High" quality and the difference will be visually imperceptible. "Good" is the default and matches what FFmpeg uses by default.
Does the file get uploaded anywhere?
No. Open this page, turn off your wifi, then try a file — it still works. That's the test.
What's the maximum file size?
Browser memory is the limit. WebAssembly caps at 2–4 GB per file. Most laptops handle 1080p videos under a gigabyte comfortably.
Why is it slow on my phone?
FFmpeg-WASM runs on your CPU, not hardware video encoders. Phones have less CPU, so encoding takes longer.
Can I cancel mid-encode?
Yes. The Cancel button terminates the worker immediately. You'll wait a few seconds the next time you start.