MOV to MP4 Converter
Your files never leave your device
Conversion runs inside your browser using WebAssembly. Nothing is uploaded; the only downloads are this page and the conversion engine. You can confirm it in your browser's network tab.
Why convert MOV to MP4?
iPhone videos are MOV files with HEVC video, which some Windows PCs, Android apps, video editors and upload forms can’t play or accept. H.264 MP4 works everywhere.
What changes in the MP4
- The video is re-encoded to H.264, the most compatible codec. File size may go up or down depending on the original’s bitrate.
- HDR (Dolby Vision/HLG) footage is converted to standard 8-bit video without tone-mapping, so bright HDR clips can look flat or washed out.
- Audio is re-encoded to AAC at 160 kbps.
How Convertz converts it
FFmpeg (WebAssembly) re-encodes the video to H.264 at CRF 23 (visually close to the source at a sensible size) with AAC audio at 160 kbps, and moves the index to the start of the file so it streams on the web. It runs on a single CPU core in your browser, so it is much slower than desktop software.
Everything happens on your device; the file is never uploaded.
Common pitfalls
- Long or 4K clips can take many minutes, and files over about 2 GB won’t fit in browser memory. Trim long videos first.
- To avoid MOV/HEVC in future, set Settings → Camera → Formats → Most Compatible on the iPhone (records H.264, larger files).
- For HDR clips, turning off Settings → Camera → Record Video → HDR Video gives standard footage that converts cleanly.
MOV vs MP4
| Property | MOV | MP4 |
|---|---|---|
| Full name | Apple QuickTime Movie | MPEG-4 Part 14 |
| Compression | Depends on codec (usually HEVC or H.264) | Depends on codec (usually H.264) |
| Transparency | Only with specific codecs (ProRes 4444) | No (in practice) |
| Works with | Apple devices natively. Windows plays H.264 MOV files; HEVC ones need an extension. Some upload forms and editors reject MOV. | Essentially everything, when the video is H.264 with AAC audio. |
What is MOV?
Apple’s video container, used by iPhone cameras and screen recordings on Mac. Recent iPhones record HEVC (H.265) video in MOV by default, often in 10-bit HDR; Pro models can also record ProRes. The MP4 format was derived from QuickTime, so the two are close relatives.
What is MP4?
The most widely supported video container. MP4 files usually hold H.264 or HEVC video with AAC audio, and play on virtually every phone, browser, TV and editing app.
Related conversions
The converter also handles 22 input formats in total. See all formats