Convert iPhone screen recording to MP4
iPhone screen recordings save as .mov files, Apple's native format. That's fine on Apple devices, and Windows can open .mov too - but plenty of places want an .mp4 specifically: upload forms, help-desk and course portals, website builders, some TVs. Wave converts the recording to .mp4 without touching the picture or sound, and moves the file's index to the front so it starts playing instantly when someone opens it from a link. Takes a few seconds, runs entirely in your browser, and nothing gets uploaded. If a recording won't play on a Windows PC at all, the cause is usually the HEVC video inside rather than the .mov label - here's the fix.
What actually changes
A quick note on what's actually happening. When you tap the Screen Recording button in iOS Control Center (a feature Apple added in iOS 11, back in 2017), your iPhone saves the recording as a .mov file - Apple's standard video format. Inside that .mov file, the actual picture data is compressed with either HEVC (on iPhone 8 and later in the default "High Efficiency" mode) or H.264 (on older iPhones or when the camera setting is "Most Compatible"). The audio is always AAC. All three of these compression formats are things MP4 accepts natively. So the conversion doesn't need to touch the picture or sound at all - it just changes the file's outer wrapper from .mov to .mp4.
The operation is a container swap - the technical term is "remux" (see Remux vs re-encode). Wave rewrites the header, updates the file's identifying label from QuickTime to MP4, moves the moov atom to the front so the MP4 fast-starts, and writes the same video and audio samples out to disk. No decoding, no re-encoding, no visible or measurable quality loss. On a modern laptop, a 10-minute 1080p iPhone recording converts in under 5 seconds because Wave is only rewriting bookkeeping bytes.
The reason this conversion matters is what the file meets next. Windows has played standard .mov files since Windows 7, but many upload forms, help-desk and course portals, website builders and some smart TVs accept .mp4 and nothing else. A recording's index also usually sits at the end of the file (it can only be written when recording stops), which makes web previews load the whole file before playing. Converting fixes both in seconds. One thing it doesn't change is the video format: if the recording is HEVC, a Windows PC without the HEVC extension still can't play it - see Why iPhone videos won't play on Windows for the fixes.
For the export step out of iPhone: the Photos app's default share sheet re-encodes video to smaller sizes on the fly, which drops quality unnecessarily. Save to Files (Share sheet → Save to Files → your Files location) or AirDrop to a Mac to preserve the original file. Sending the recording via Messages or WhatsApp compresses it aggressively at the phone side and the resulting file is much lower quality than the original recording. On a 4K 60fps recording, the difference between the AirDropped original and the WhatsApp-compressed version is roughly 8x file size and clearly visible on any decent display. How to compress a video on iPhone covers the built-in ways to shrink a recording, and Why videos are blurry when sent from iPhone to Android explains the messaging side.
Three steps.
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Step 1
Save your iPhone screen recording to Files (Share sheet → Save to Files) or AirDrop to a computer to preserve the original file.
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Step 2
Drop the .mov onto Wave. Wave confirms the fast-copy path - no re-encoding needed.
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Step 3
Convert and save the MP4. Rewriting the container takes seconds regardless of recording length.
Answers, specifically.
Why does my iPhone save recordings as .mov instead of .mp4?
iOS uses QuickTime's container as its native default; Apple's ecosystem is MOV-native. The file plays on Apple devices and on most other systems, Windows included, but MP4 is the label more upload forms and devices accept. Converting wraps the same bytes in an .mp4.
Can Windows play iPhone screen recordings without converting?
Usually, yes, if the video inside is H.264: Windows Media Player and the Movies & TV app have handled .mov since Windows 7. If the recording is HEVC, Windows needs the HEVC Video Extensions ($0.99, or preinstalled on many PCs) or VLC. Converting to MP4 doesn't change that, because the HEVC video is copied as it is.
Will HEVC video keep playing after the conversion?
Yes. The MP4 wraps the same HEVC bitstream. Windows viewers - on Windows 10 or 11 alike - may need the HEVC Video Extensions app ($0.99 in the Microsoft Store, unless their PC maker preinstalled the free version). Modern Macs, iPhones, iPads, most Android devices and most current browsers decode HEVC-in-MP4 without extra installs.
The recording is huge - can I compress it?
In the same pass: after you drop the file, open Options and pick a File size (16 MB for WhatsApp, 18 MB for email, 20 MB for Discord, or your own number) or a lower Resolution. Wave converts and compresses together, in your browser. For long recordings, HandBrake's Fast 1080p30 preset on the desktop is quicker.
What's the max recording length iPhone allows?
No hard time limit; recording continues until storage fills or you tap stop. Long sessions routinely produce files above 4 GB. Wave handles up to 8 GB per file - the ceiling is your browser's RAM and disk speed for the container rewrite, not a Wave limit.
How do I include app audio but not room audio?
Long-press the Screen Recording button in Control Center before starting, and toggle the microphone off. Sound from apps (Safari playback, YouTube in-app, game audio) still records because that's routed through the OS audio graph, not the mic; the ambient room audio is what gets excluded.
Why is my converted MP4 the same size as the .mov?
Because the video and audio bytes are copied through untouched. Only the container header changes. Expect the MP4 to be within a few kilobytes of the .mov - the difference is the ftyp header, the fast-start moov relocation, and a few housekeeping atoms. That's exactly what you want: no quality loss and no time spent decoding.