Convert QuickTime MOV videos to MP4 locally. Free, private, runs in your browser.
100% private — your files and text never leave your browser. All processing happens locally on your device.
Choose a file
or drop it here
MOV files from iPhones, cameras, and QuickTime exports can be inconvenient outside the Apple ecosystem. This converter runs FFmpeg.wasm in your browser so the source file stays on your device. The app loads the FFmpeg engine as a static asset, writes the MOV into the browser's local FFmpeg filesystem, and creates an MP4 download from that local process.
A MOV can sometimes become an MP4 by remuxing, which copies compatible audio and video streams into a new container without quality loss. If the streams are not MP4-compatible, Auto mode falls back to H.264/AAC transcoding. Transcoding is slower, but it produces the kind of MP4 that phones, browsers, and editors are most likely to accept.
Video conversion is one of the heaviest things a browser can do. Short clips and normal phone videos are the best fit. Long 4K files may run out of memory or take a long time because the whole workflow happens in the current tab instead of on a media server.
No. The selected MOV is written to FFmpeg.wasm inside your browser, converted there, and returned as a local download. Convertful does not send the video to a server.
Video work is CPU and memory intensive in the browser. Auto mode first tries a fast remux, then falls back to H.264/AAC transcoding when the MOV streams are not MP4-compatible.
Use Auto for most files. Choose Remux when you want a faster, no-reencode attempt, or Transcode when you need a broadly compatible H.264/AAC MP4.
No. Remux mode copies compatible video and audio streams into an MP4 container without re-encoding, so quality stays the same. If the streams are not MP4-compatible, use Auto or Transcode.
Short clips and phone videos work best. Very large 4K files can exceed browser memory limits, especially on laptops or mobile devices, because the FFmpeg engine runs inside the current tab.