MOV to MP4 Converter - Free, No Watermark
Convert a MOV video - the format iPhones and many cameras record in - to widely-compatible MP4, entirely in your browser using your device's built-in hardware video encoder.
Maintained by Hirantha Sandaruwan Lakshan. Updated 31 July 2026.
How it works
The video is decoded and re-encoded using WebCodecs, the browser's native hardware-accelerated codec API, rather than a slow software encoder running in JavaScript.
Output is MP4 with H.264 video and AAC audio - the most broadly compatible combination, playable on virtually any device, unlike MOV which some non-Apple software still handles poorly.
Before starting, the tool checks whether your browser can decode the source. iPhones have recorded in HEVC (H.265) inside MOV by default since iOS 11, and some desktop browsers can't decode it - the tool names this directly instead of failing with a generic error.
Worked examples
Converting an iPhone video for a Windows PC
MOV files from iPhone sometimes won't open in older Windows software. Converting to MP4 fixes that with one drop-and-download.
Uploading to a platform that rejects MOV
Some upload forms only accept MP4 - convert here first rather than installing separate software.
Shrinking a MOV recording at the same time
Choose the Smallest or Balanced preset while converting to also reduce the file size, not just the format.
Frequently asked questions
Is my video uploaded to a server?
No, decoding and re-encoding both happen locally in your browser.
Why does it say my video can't be processed?
Usually an HEVC-encoded MOV on a browser without a hardware decoder for it - common on Linux. Try Safari, or a browser with HEVC support.
Will the converted MP4 lose quality?
Some re-encoding loss is inherent to converting between formats, but the Balanced preset keeps this minimal at 1080p.
Is there a file size limit?
A soft warning appears on very large files on mobile, but there's no hard cap - it depends on your device.
Why won't my MOV file play on Windows or Android?
MOV is Apple's container, and iPhones increasingly record HEVC video inside it, which many non-Apple players can't decode. Converting to MP4 with H.264 fixes both problems at once.
Will the file get smaller?
Often yes, though that isn't the goal - the point is compatibility. If size is what you're after, use the video compressor and pick a preset.
Does it keep the audio?
Yes, the audio track is carried through and re-encoded to AAC, which is what MP4 players expect.
What about HEVC files from an iPhone?
If your browser can decode HEVC the conversion works normally. Chrome on Linux often can't, and the tool names HEVC explicitly rather than failing vaguely.
Does this work on my phone?
Yes, including directly on the iPhone the video was likely recorded on. Phones have a lower file size limit than desktop, since phone browsers can run out of memory on very large videos.
Sources & references
Updated Jul 31, 2026