How to Convert iPhone Video to MP4
You AirDrop a clip to a colleague and they get a black screen with sound. You drag it into an editor and the timeline stays empty. The culprit is the .mov container with HEVC video inside — here is how to turn it into an MP4 that plays literally everywhere, without installing anything.
Morphix video converter
MOV, HEVC, AVI, MKV and more into MP4, with a live progress bar. Runs in your browser.
What is actually wrong with the file
Two separate things decide whether a video plays: the container (.mov, .mp4, .mkv) and the codec inside it (H.264, HEVC, AV1). iPhones default to a .mov container with HEVC video and AAC audio. Apple devices handle that natively; much of the rest of the world does not.
Converting to MP4 with H.264 fixes both halves at once. H.264 is the most widely supported video codec in existence — every browser, phone, TV, console and NLE decodes it.
Step by step
- Transfer the clip to your computer. Prefer AirDrop or a cable over messaging apps, which re-compress.
- Open the Morphix video converter.
- Drag the .mov file onto the drop zone.
- Choose MP4 as the target format.
- Start the conversion and watch the progress bar and estimated time.
- Download the MP4 when it finishes.
Keeping the quality you started with
Always convert from the original file. A clip that has been through WhatsApp, Messenger or Instagram has already been re-compressed once, and converting a re-compressed file stacks artefacts.
If the output looks soft, raise the quality setting rather than the resolution — upscaling adds nothing. If the file is too large for an upload limit, run it through the video compressor afterwards instead of dropping quality twice during conversion.
Just want the audio?
Interviews, lectures and voice notes recorded as video are usually needed as audio only. The audio extractor pulls the AAC track out of a MOV or MP4 and gives you an MP3 or M4A without touching the video stream — much faster than a full conversion, and it also runs entirely in the browser.
FAQ
Why won't my iPhone video play on Windows?
iPhones record in a .mov container using the HEVC (H.265) codec. Windows Media Player and many editors ship without an HEVC decoder, so you get audio with a black screen, or nothing at all. Re-wrapping or re-encoding to MP4 with H.264 fixes it everywhere.
Is MOV to MP4 conversion lossless?
If the clip is already H.264 inside a MOV, the change to MP4 is essentially a container swap and quality is untouched. HEVC clips have to be re-encoded to H.264 for maximum compatibility, which is lossy — though at a sensible bitrate the difference is invisible.
How do I convert an iPhone video without installing anything?
Open the Morphix video converter, drop the clip, and choose MP4. It uses FFmpeg compiled to WebAssembly, so the whole conversion runs in the browser tab with no install and no upload.
Will the file get bigger?
Often yes. H.265 is roughly twice as efficient as H.264, so the same visual quality in MP4/H.264 takes more space. Lower the quality setting a notch if the size matters more than pixel-perfect fidelity.
Can I stop the iPhone recording in HEVC?
Yes. Settings → Camera → Formats → Most Compatible records H.264 in MP4-compatible form from then on. It uses noticeably more storage, and 4K at 60 fps and some HDR modes still require HEVC.
How long does a long clip take?
In-browser encoding runs at roughly real time on a modern laptop, so a 5-minute clip takes a few minutes. Keep the tab in the foreground — background tabs get throttled by the browser.