M4V Compressor
Compress an M4V (iTunes-style MP4) file down to a target size.
Drop files, or click to browse
M4V files only — processed one at a time
Frequently asked questions
What's the difference between quality and resolution here?+
Quality controls how aggressively each frame is compressed; resolution controls the pixel dimensions. Lowering either shrinks the file — combine both for the biggest savings.
Will the output still play everywhere?+
Yes — the M4V container and codec choice are kept broadly compatible with players and editors.
Is my video uploaded anywhere?+
No, compression runs locally in your browser using its own built-in media codecs.
Is there a maximum file size?+
There's no fixed upload limit — since everything runs on your device, the practical limit is your browser's available memory, which handles typical clips and even fairly long recordings without issue.
How do I compress a M4V?+
Drop your M4V into the box above, pick a quality tier (and optionally a lower resolution), and download the smaller result once it finishes.
About M4V
What is M4V?
M4V is Apple's video variant of the MP4 container, used by iTunes for movies and TV show downloads.
Full M4V format guide →A smaller M4V file means faster uploads, faster page loads, and fewer headaches with size limits on email or messaging apps. The tradeoff is a small, controllable amount of playback quality, which you can dial in yourself.
How it works
- 1
Drop your file in
Drag your video onto the box above, or click it to browse — there's no account to create and no upload to wait on.
- 2
Adjust the slider
Drag the quality slider and watch the estimated file size update in real time.
- 3
Download the result
Your browser processes everything locally and hands you a download link the moment it's done — nothing was ever sent to a server.
Is it private?
Everything happens locally, inside this browser tab. Your video is read from disk, processed with WebAssembly running on your own device, and handed back to you as a download — it's never transmitted anywhere, so there's nothing to intercept and nothing stored on a server.
Common use cases
- Content downloaded through Apple's ecosystem
- Uploading a clip to social media
- Sending a video over email or chat
- Freeing up storage on a phone or laptop
Supported formats
This is one of many pairings the video toolkit handles. In total it covers:
Other compressors
Format details
About M4V files+
M4V is Apple's video variant of the MP4 container, used by iTunes for movies and TV show downloads.
M4V is, structurally, almost identical to MP4 — Apple created the distinct extension mainly to mark content sold or rented through iTunes, occasionally with added copy protection (FairPlay DRM) for purchased movies and TV shows. Because it shares MP4's underlying structure, unprotected M4V files play in nearly anything that reads MP4; the friction only shows up with DRM-protected downloads, which are tied to an Apple account.
How to open a M4V file
Opens readily in QuickTime Player, iTunes/Apple TV app, Most modern media players. For real editing, use Final Cut Pro, Adobe Premiere Pro.
Good for
- plays natively in Apple's ecosystem
Watch out for
- occasionally needs converting for non-Apple video players
Need another format? Try the full Video Compressor, or explore all video tools.