shycut

Convert M4V to MP4

An M4V is Apple’s flavour of MP4. If an app turns it away because of the extension, drop it here and get a plain MP4 instead.

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Drop your video here

Choose your video

MP4, MOV, WebM or MKV. It opens right here, on your device.

  • Nothing uploaded
  • No sign-up
  • No watermark

Tested in the browser

BrowserResultWhat came out
Google Chrome 155ConvertedMP4: H.264 video, AAC sound, 1280×720
WebKit 27.2 (Safari’s engine)ConvertedMP4: H.264 video, AAC sound, 1280×720

On October 24, 2026, a 10-second 1280×720 M4V (H.264 video, AAC sound) went through this page’s button in each browser, and what came out was read back with ffprobe.

The test file carried a location tag; no converted copy kept it.

When to turn M4V into MP4

Most M4V files are ordinary MP4 video under another name, but not every app looks past the extension. Windows apps, Android phones and upload forms are the usual ones to balk.

Shycut encodes the video into a fresh MP4 rather than renaming it, so the result is a clean, standard file. Films and episodes bought from a store are copy-protected; those won’t open here.

M4V and MP4, in short

M4V
Apple’s flavour of MP4, used by the TV app, iTunes and some video tools. An unprotected M4V is an MP4 in all but name; one bought from a store is copy-protected.
MP4
The format that plays almost everywhere: phones, browsers, TVs, editing apps and every social platform take it. Inside is usually H.264 video and AAC sound.

How to convert

  1. Open the M4V

    Press the button and drop the file, or pick it from your files. It opens in this browser tab: nothing is uploaded, so there is no upload limit to hit.

  2. MP4 is already chosen

    The save window opens set to it. Change the file name or the quality if you like.

  3. Save

    The new file is written on your device and downloaded. Several files? Drop them together and they are converted one after another.

What changes, what stays

Picture and length
Nothing is cut or reframed: the video keeps its own picture size and runs from start to end.
Sound
The first sound track, at its own level, in stereo at most.
Quality
Small, Balanced or High; Balanced is chosen to begin with.
Details about you
The file is written from scratch, so none of the original’s metadata comes along: no location, no camera or phone model.

Questions

Can’t I just rename .m4v to .mp4?

Often that works, since the inside is the same. When it doesn’t, or the app still refuses the file, converting writes a standard MP4 from scratch.

Why does my M4V not open at all?

It is most likely copy-protected, as videos bought from Apple’s store are. Shycut can’t open protected files.

Are chapter marks kept?

No. The MP4 is written from scratch, and an M4V’s chapter marks are not carried into it.

Your video stays with you.

Open Shycut, drop the video in and export. Free, with no account, and your video never leaves your device.

Choose your video

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