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ShrinkVid

Compress MOV Videos (iPhone & QuickTime)

Drop a .mov file below to shrink it — ShrinkVid re-encodes it to a much smaller H.264 MP4 that plays on Windows, Android and the web. iPhone MOVs typically get 60–85% smaller, all on your device.

Processed on your device — files are never uploaded.

How to compress MOV videos (iPhone & QuickTime)

  1. Tap “Choose file” and pick the MOV from Photos or Files (on iPhone choose “Most compatible” if asked).
  2. Pick Medium quality and 1080p or 720p.
  3. Tap Compress video.
  4. Download — on iPhone, the file goes to Files › Downloads; use Share › Save Video to add it to Photos.

Why iPhone MOV files are so large

iPhones record 4K or 1080p at high bitrates and often 60 fps. A minute of 4K60 HEVC can exceed 400 MB. Converting to 1080p at 30 fps with ShrinkVid’s Medium preset commonly brings that under 40 MB.

MOV vs. MP4

MOV and MP4 are near-identical containers (both derive from the QuickTime file format). MP4 is more widely supported — Windows, Android, Discord, WhatsApp and most websites prefer it — so ShrinkVid outputs MP4. If you only need the format changed, see MOV to MP4.

HDR and Dolby Vision clips

Recent iPhones record HDR (Dolby Vision) by default. The compressed MP4 is standard dynamic range H.264, so colours may look slightly flatter on HDR displays but correct on everything else — ideal for sharing.

Private by design

ShrinkVid never uploads your files. The page loads once, then all decoding and encoding happens on your device using the browser’s built-in WebCodecs API (hardware-accelerated video) and WebAssembly image codecs. That makes it safe for personal, confidential or work files — and there is no queue, no file size cap and no watermark. Read how it works.

Frequently asked questions

Are my files uploaded to a server?

No. ShrinkVid runs entirely in your browser. Files are read and encoded on your own device with WebCodecs and WebAssembly, so nothing is uploaded, stored or seen by anyone else. You can even disconnect from the internet after the page loads and it keeps working.

Does it work on iPhone?

Yes. Open this page in Safari on iOS 16.4 or later, choose your MOV from Photos or Files and compress it. Everything runs in Safari; no app install is needed.

Can I keep the .mov extension?

The output is MP4 because it is smaller-friendly and universally supported. If you specifically need MOV, the MP4 plays in QuickTime and iMovie without any change.

Is it really free? Is there a watermark or file size limit?

It is completely free with no watermark, no sign-up and no server-side file size limit. Because processing happens on your device, the only practical limits are your device’s memory and speed.

Last updated · by the ShrinkVid team