MOV vs MP4
| Property | MOV | MP4 |
|---|---|---|
| Full name | QuickTime File Format | MPEG-4 Part 14 |
| File extensions | .mov, .qt | .mp4, .m4v |
| Created by | Apple | MPEG (ISO/IEC 14496-14) |
| Introduced | 1991 | 2003 |
| Compression | Depends on the codec; iPhones use HEVC or H.264, editors often ProRes | Depends on the codec inside; usually lossy |
| Codecs inside | H.264, H.265 (HEVC) or ProRes video; AAC or PCM audio | Usually H.264 or H.265 video with AAC audio |
| Opens on | iPhone, Mac and QuickTime; Windows plays most; some websites and Android apps struggle with HEVC MOVs | Every phone, computer, TV, browser, editor and social network |
| Best for | Recording on Apple devices and professional editing | Sharing, uploading and playing video anywhere |
Why convert MOV to MP4?
MOV and MP4 are close relatives: MP4 was built on Apple's QuickTime format. Often the problem with a MOV is not the container but the codec inside. Since iOS 11, iPhones record HEVC (H.265) by default, which many Windows PCs, Android apps, older TVs and websites cannot play without extra software.
This converter checks what is inside first. If the MOV holds H.264 video with AAC audio, it simply rewraps the streams as MP4: no re-encoding, no quality loss, and a 1 GB file takes seconds. If it holds HEVC or ProRes, the video is re-encoded to H.264 using your device's hardware encoder where available. That takes longer, roughly real time or faster on a recent laptop, and the result plays everywhere.
Large clips work because the file is read in pieces rather than loaded whole, but very long 4K videos still need patience and free memory. If the MP4 is too big to send, run it through the Video Compressor next.