MOV is Apple's native video container format — built on the QuickTime framework and the default recording format for iPhones and macOS. Your iPhone records video as MOV. Your Windows PC has opinions about that. It is technically excellent — MOV supports high-quality codecs including H.264, H.265, and ProRes, which is the standard for professional video editing. The problem is compatibility. On macOS and iOS, MOV plays everywhere. On Windows and Android, support is inconsistent, and you will occasionally hit codec errors that make no sense. MOV files from iPhones also tend to be large because they encode at high bitrates. For sharing across platforms, converting to MP4 solves almost every compatibility issue while preserving quality.
Technical details
Full Name
Apple QuickTime Movie
MIME Type
video/quicktime
Developer
Apple
Magic Bytes
00 00 00 ?? 66 74 79 70 71 74
Safety
.mov is a known, safe format.
What opens it
Apple QuickTime
FREEmacOS
VLC
FREEAll
Windows Media Player
FREEWindows
* Codec dependent
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FAQ
What is the difference between MOV and MP4?
They are closely related containers — both can hold H.264 or H.265 video. MP4 is the universal standard that plays everywhere. MOV is Apple's variant, optimised for macOS/iOS but inconsistent on Windows and Android. For sharing, MP4 is the safer choice.
How do I convert MOV to MP4?
Use <a href="https://fwip.app/tools/mov-to-mp4/">fwip's MOV to MP4 converter</a> — it converts in your browser without uploading. You can also use HandBrake (free) or VLC for batch conversions.
Why are MOV files so large?
iPhones record at high bitrates for maximum quality — a one-minute 4K video can be 350 MB or more. MOV also supports ProRes, which prioritises editing quality over file size. Converting to MP4 with H.265 encoding can cut file size by 40–60% with minimal visible quality loss.
Can Windows play MOV files?
Sometimes. Windows Media Player and the Movies & TV app handle some MOV files but choke on others depending on the codec. VLC (free) plays virtually all MOV files. For guaranteed compatibility, convert to MP4.