What Video File Format Does iPhone Use?
The iPhone Video Format Is MOV, Recorded With HEVC or H.264
Every iPhone video is saved as a MOV file. Inside, the picture is encoded with HEVC (also called H.265) when the camera is set to High Efficiency, which any iPhone 7 or later can record. If you pick Most Compatible in Settings > Camera > Formats, the camera records H.264 instead.
So the answer to "MP4 or MOV?" is MOV. The file extension tells you the container, and the codec setting decides how the picture is compressed inside it.
Two terms do the work here. A container (the file wrapper, like MOV or MP4) holds the video and audio streams. A codec (the method that compresses the picture, like HEVC or H.264) decides how those streams are stored.
Questions about iPhone supported video formats usually mean both.
Why an iPhone MOV Won't Play on Windows
You send a clip to a Windows PC, open it in the Photos app, and get an error. The MOV extension looks like the culprit. It isn't.
The blocker is the HEVC video codec. The add-on Microsoft asks for covers HEVC-encoded videos only, so an iPhone video recorded in H.264 doesn't need it.
For HEVC, Microsoft's support page says you have to buy HEVC Video Extensions ($0.99) from the Microsoft Store. The free HEIF Image Extensions have to be installed alongside it.
That's why renaming a file from .mov to .mp4 fixes nothing. The media inside is still HEVC, and an app that can't decode it still can't play it. When an app lists its supported video formats, check the codecs, not just the extensions.
You have three ways out:
- Buy the Windows extension, if the video only needs to play on your own PC.
- Switch your camera to Most Compatible, so future clips record using H.264.
- Convert video to MP4 with H.264. It's among the most compatible video formats: most players, editors and websites accept it.
HEVC vs. H.264: What Actually Changes When You Switch
The switch is a trade between file size and compatibility. Apple says HEVC gives better compression than H.264 at the same visual quality, so it uses less storage on your iPhone and in iCloud Photos.
| HEVC (High Efficiency) | H.264 (Most Compatible) | |
|---|---|---|
| File size | Smaller | Larger for the same quality |
| Windows playback | Needs a paid extension | No HEVC extension needed |
| Best for | Clips that stay on Apple devices | Clips you share with other devices |
The setting only affects new recordings. Any iPhone video already in your library keeps its original format.
Pro models add a third option, Apple ProRes. It targets professional editing in iMovie, Final Cut Pro or other ProRes-aware apps. According to Apple, ProRes files are up to 30 times larger than HEVC files.
It only exists on Pro models from the iPhone 13 Pro onward, and it doesn't work with Cinematic mode, slo-mo or time-lapse. For sharing, it's the wrong choice.
The full codec comparison, including which devices decode HEVC, is in our guide to HEVC vs H.264.
Converting an iPhone Video to MP4 (and When You Actually Need To)
You don't always need to convert an iPhone video. If it stays on your iPhone, Mac or iPad, the original video plays fine. Convert it when it heads to a Windows PC, a web form that only takes MP4, or an editor that rejects HEVC.
What happens during conversion depends on the codec inside:
- MOV with H.264: the streams can be copied into an MP4 container without re-encoding. No quality loss, and it takes seconds.
- MOV with HEVC: the video has to be re-encoded using H.264. That costs a small amount of quality and takes longer, because every frame is compressed again.
You can convert an iPhone MOV to MP4 in your browser, on the phone itself or on a computer. It works as an iPhone video converter with no app to install. The converter picks the lossless copy when the file allows it, and re-encodes to H.264 with AAC audio when it doesn't.
Nothing is uploaded, there's no account, and the output has no watermark. If you only need the sound, converting to one of the audio formats, like MP3, skips the video entirely.
One limit to know: recent iPhones record in HDR (a wider range of brightness and color). After a re-encode, an HDR clip can look slightly washed out, because the converter doesn't tone-map it (adjust the brightness range for standard screens).