Converters MOV to MP4 converter
Turn iPhone and QuickTime MOV files into MP4, usually without re-encoding a single frame.
Anything but Original forces a re-encode.
Quality, if a re-encode is needed
Drag files here, or
Converted to MP4 on your device. The converter itself is a 9.8 MB download, once.
Ready. Runs locally on your device.
Your files stay on your device. The tool works directly in your browser, using your device to process your files. Nothing is sent to our servers, and we never receive, store, or see your files or figures.
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Cite this page
Reembun. (2026, August 12). MOV to MP4 converter. https://reembun.com/mov-to-mp4
How to use it
Add the MOV
Drop in the QuickTime file, or a batch of them from a camera or an iPhone.
Wait for the engine once
The converter downloads on the first run and is reused from then on.
Convert
MP4 is already selected. A MOV from an iPhone usually holds streams MP4 accepts as they are, so it can be repackaged without re-encoding.
Download the MP4
One file downloads directly, several arrive as a ZIP.
Why this conversion is almost always instant
A MOV file from an iPhone contains H.264 video and AAC audio. So does an MP4 from an Android phone. The two files hold the same thing, described the same way, inside different wrappers.
MOV is Apple’s QuickTime container, and MP4 is the ISO standard that was derived directly from it. They are close relatives. Everything an iPhone puts in a MOV is legal inside an MP4, so converting between them is a matter of rewriting the index and the headers while the video and audio streams are copied across untouched.
That is why this page finishes in seconds where a server-based converter takes minutes: it is not compressing anything. It is repackaging. And because nothing is decoded, nothing is lost. The picture in the MP4 is the same bytes as the picture in the MOV.
When you actually need this
- Windows. Media Player, Movies & TV and a good deal of Windows software refuse MOV outright.
- Android. Most gallery and messaging apps will not open a MOV sent from an iPhone.
- Uploads. Some upload forms, learning platforms and CMSes accept MP4 only.
- Editing software. Several Windows editors either reject MOV or import it without audio.
- File size confusion. MOV and MP4 of the same footage are the same size. If something looks smaller, it was re-encoded, not repackaged.
The one case that is different
If your MOV came out of a professional camera or a Final Cut export, it may hold ProRes rather than H.264. ProRes is an intermediate codec designed for editing: enormous files, very little compression, and no place inside an MP4.
Those files have to be genuinely re-encoded to H.264, which takes real time and does discard quality. That is the correct behaviour for delivering a finished video, and the wrong thing to do to footage you still intend to edit. If the file is going back into an edit, leave it as ProRes.
What happens to the metadata
The video and audio survive exactly. Some things do not make the trip:
- Creation date is carried across where the containers agree on how to write it.
- Location data embedded by the iPhone is dropped. For a video you are about to share, that is a privacy improvement.
- Chapter markers and multiple audio tracks may be lost, since MP4 handles both less flexibly than MOV.
Nothing is uploaded
The conversion runs on your own machine, using a copy of FFmpeg compiled to WebAssembly that your browser downloads once. Home videos, recordings of children, footage taken inside your house: none of it is sent anywhere, because there is nowhere for it to be sent to.
Common questions
Does converting MOV to MP4 lose quality?
Almost never, and the tool tells you when it did not. A MOV from an iPhone holds H.264 video and AAC audio, both of which are legal inside an MP4, so the conversion copies them across without decoding anything. The picture in the MP4 is bit-for-bit identical to the picture in the MOV. Quality is only lost in the uncommon case where the MOV holds ProRes, which MP4 cannot carry.
Why is my MOV file not playing on Windows or Android?
MOV is Apple's QuickTime container. Windows Media Player and most Android apps will not open it even though the video inside is ordinary H.264 that both platforms can decode perfectly well. The container is the problem, not the video, which is precisely why this conversion is usually instant.
How long does it take?
Seconds. Because the streams are copied rather than re-encoded, the job runs at the speed of your disk. A 1 GB file takes a few seconds once the converter has loaded. The one-off 9.8 MB engine download before the first conversion takes longer than the conversion itself.
Will it work with a 4K iPhone video?
Yes, and at the same speed. A stream copy never looks at the pixels, so resolution makes no difference to how long it takes.
What about the ProRes files from my camera?
ProRes cannot live inside an MP4, so those are re-encoded to H.264 instead. That is slow and it does cost quality, which for ProRes footage headed into an edit is usually the wrong trade. Keep ProRes in a MOV or an MKV and convert only the final export.
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