Convert MP4 to MOV online
Convert an MP4 video to MOV (the QuickTime container) directly in your browser. Unlike most video conversions, this is a remux — the video and audio streams are copied as-is, without re-encoding — so it's nearly instant and involves zero quality loss.
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Instead of decoding and re-encoding the video (as a normal conversion would), the tool copies the already-compressed H.264 and AAC streams from the MP4 bit-for-bit and repackages them inside a MOV container. This works because MP4 and MOV belong to the same container family — both derive from Apple's original QuickTime format — so only the wrapper changes, not the content.
Use cases
- Prepare a video for professional editing software or a Mac-centric workflow that specifically expects the .mov extension.
- Meet the format requirement of an app that only imports MOV files, even though the underlying codec (H.264/AAC) is the same as in MP4.
- Convert many MP4 videos to MOV quickly, without waiting for a full re-encode.
How it works
- 1
Upload your MP4 video
Drop the file in or select it from your device.
- 2
Click Convert
ffmpeg.wasm copies the video and audio streams into a new MOV container in your browser.
- 3
Download the MOV
Once it's done, download the resulting video.
Technical details
Runs ffmpeg.wasm in your browser with the `-c copy` flags, which tell it not to decode or re-encode anything. By skipping the video encoding step entirely — the slowest part of any conversion — this process is much faster than a conversion like MKV to MP4, and the result is bit-for-bit identical in its video and audio data; only the container wrapping it changes.
Frequently asked questions
Does converting MP4 to MOV lose quality?
No. It's a remux, not a re-encode: the video and audio streams are copied as-is, bit-for-bit, into the new container.
Why is this conversion so much faster than other video conversions?
Because it doesn't re-encode any frames — it just repackages the already-compressed data into a different container, whereas conversions like MKV to MP4 do have to decode and re-encode every frame.