How to use MOV to MP4 Converter
- 1Drop your MOV file into the box.
- 2Leave Fast, original quality selected, or choose Most compatible (H.264) if the MP4 has to play on old PCs, TVs or strict upload forms.
- 3Click Convert to MP4.
- 4Play the result to check it, then click Download MP4.
MOV and MP4 are close cousins
Both formats come from the same QuickTime family. A MOV from an iPhone usually holds H.264 or HEVC video and AAC audio, which MP4 can hold too. So the tool doesn't need to re-encode anything: it moves the same video and audio data into an MP4 container. That is why it's fast and the quality is identical.
Some websites, Windows apps and job or government upload forms only accept files ending in .mp4, and this is the cleanest way to get one.
HEVC videos and the H.264 option
Recent iPhones record in HEVC (H.265) by default. The tool tells you when your video uses it. An HEVC MP4 plays on iPhone, Mac, Android and Windows 10 or 11 with HEVC support, but older PCs, some TVs and some sites can't play it.
For those cases choose Most compatible (H.264). The video is re-encoded to H.264 at a bitrate close to the original quality. On current browsers the built-in hardware encoder does this quickly; otherwise FFmpeg does it more slowly in software. If you also want a smaller file, use Compress Video instead, which outputs H.264 MP4 too.
Large files and phones
Because nothing is uploaded, the size of the MOV doesn't slow anything down except reading it from your disk. A 3 GB iPhone recording converts in fast mode in about the time it takes to copy the file. On phones, browsers give each tab limited memory, so the tool warns you about files over roughly 500 MB; a computer is the safer choice for those. Keep the tab open until the download button appears.
Want only part of the video? Trim Video keeps the MOV format and is just as fast.
Frequently asked questions
Does converting MOV to MP4 lose quality?
Not in the default fast mode: the video and audio streams are copied unchanged. Only the H.264 option re-encodes.
Why won't my converted iPhone video play on Windows?
It probably uses HEVC and the PC lacks the HEVC codec. Convert again with Most compatible (H.264).
Does it use FFmpeg?
Most of the time it uses your browser's built-in audio and video engine. For formats the browser can't handle, it uses FFmpeg compiled to WebAssembly (GPL, source linked at /tvid/FFMPEG-NOTICE.txt), a one-time download of about 10 MB that then stays in your browser cache.
Is there a file size limit?
Not from us. Files are processed on your device, so even multi-gigabyte recordings work on a computer. On phones the tool warns you about very large files.
Can I convert a Mac screen recording?
Yes. QuickTime screen recordings are MOV files and convert the same way.