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Small Things Sorted

Convert a video

Between MP4, WebM and MOV - without re-encoding where possible.

Stays on your device – The video is processed in your browser. It is not uploaded.

The first click loads about 10 MB of processing module. If your video already fits the target format, repacking takes seconds - otherwise it is recalculated, which takes roughly as long as the video runs.

Drop your files here

or

You can also paste with Ctrl+V.

What you type is processed in your browser and never sent to us.

How to do it

  1. Pick your video

    Drop the file in or choose it.

  2. Choose the target format

    Below it says whether it will repack or recalculate.

  3. Go

    For a recalculation the bar shows the remaining time.

  4. Download

    The result stays for 24 hours in the list under the tool.

What this is for

The program will not take WebM, the website will not take MOV, and your colleague cannot open it at all. Change the format and be done.

Often no conversion is needed at all. MP4 and MOV are two wrappers around the same thing: if it holds H.264 with AAC - and almost every phone video does - the file is repacked rather than recalculated. That takes seconds and the picture stays bit for bit as it was. The tool tells you beforehand which of the two cases you have.

WebM cannot be had without computing. WebM does not do H.264, so every frame has to go through again. Single-threaded in a browser that takes roughly as long as the video runs - so a few minutes for a five-minute clip. Once it is running, the actual remaining time is shown above the bar.

Common questions

No. The processing runs in your browser.

Because MP4 and MOV are only wrappers and both hold the same codecs - the picture is carried across one to one. WebM cannot do H.264, so every single frame has to be recalculated. That is the difference between seconds and minutes.

Not when repacking - nothing is touched there. With a real conversion yes: the picture is compressed again, and an already compressed source becomes a second compression. At the settings used here it is barely visible, but it is there.

Roughly as long as the video runs - twice that at 1080p, more on an older device. A rough estimate is shown before you click, the actual remaining time while it runs.

Missing a tool? Tell us which one.