ConvertWarp

MOV to MP4

Re-encode a short MOV clip as an MP4. A long or unusual clip can fail on phones.

Video tools use FFmpeg (GPL-2.0-or-later).

About this tool

iPhone and camera apps often export QuickTime MOV. Slides, Discord, and many editors prefer MP4. This page re-encodes a short MOV as MP4 with ffmpeg.wasm inside the browser so the clip never goes to a conversion farm.

Browser video conversion is heavy. Files over 50 MB are blocked. Clips above about 10 MB still run but can freeze a phone tab — that warning is honesty, not an upsell. Odd codecs inside a .mov shell can fail even when the extension looks right.

A local ffmpeg build transcodes MOV to MP4. Core and WASM load as site assets (code, not your movie). 50 MB cap. Long or unusual clips can fail when memory runs out.

How to convert MOV to MP4

  1. Choose a MOV. It stays on your device.
  2. Convert. A large file may make the tab slow; it is still local.
  3. Download the MP4.

50 MB. Phones may struggle well below that. This is not a YouTube downloader. DRM-wrapped iTunes files will not decode.

FAQ

Does the QuickTime file go to a transcode farm?
No. ffmpeg.wasm reads it in this tab. The movie is not posted to ConvertWarp.
Why 50 MB?
WASM memory and tab stability. It is not a paid ceiling.
Can I keep the original quality?
Re-encoding always changes the bitstream. For a lossless remux you would need a desktop tool; this page transcodes so browsers can play it.
Audio only?
Use Extract audio or MP4 to MP3 after you have an MP4.
WebM or MKV?
Not on this URL. The sniff expects QuickTime MOV.

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