WebM to MP4 free

WebM is what browser screen recorders, Loom-style tools and many download sites produce, and it is what PowerPoint, iPhones and WhatsApp refuse to open. This page converts the WebM to a standard H.264 MP4 on your device, at the same resolution and frame rate.

Drop a video here MP4, MOV, WebM, MKV, 3GP · up to a few GB on a laptop, ~500 MB on a phone · nothing is uploaded

Choose a video

Plays everywhere after

H.264 video and AAC audio in an MP4: PowerPoint, iPhone, Android, WhatsApp, TV and every editor.

Keeps resolution and frame rate

A 1080p 60 fps screen recording stays 1080p 60 fps unless you choose otherwise.

On your device

Recordings of your screen often contain private information; here they never leave your computer.

Frequently asked questions

Why does PowerPoint not accept my WebM?

Office expects MP4 with H.264. WebM uses VP8 or VP9, which Office does not decode on most systems. Converting fixes it.

How long does it take?

WebM has to be re-encoded, so expect roughly real time or faster on a modern laptop: a 5-minute recording in 2 to 5 minutes.

Can I shrink it at the same time?

Yes. Choose a lower quality or resolution in the options, or use the Video Compressor afterwards for an exact MB target.

Is anything uploaded?

No. The file is processed in your browser on your own device. Nothing is sent to a server, nothing is stored, and it works offline once the page has loaded.