Convert WebM to MP4
Turn a WebM video, such as a screen recording or a downloaded clip, into an MP4 that phones, WhatsApp and video editors accept. The video is re-encoded to H.264 with AAC sound.
- Runs on your device
- No sign-up
- Free, no watermark
This page opens the Video Converter with the settings for this task. You can change any of them above.
Guide: MOV to MP4: How to Make iPhone Videos Play Everywhere
How to use the WebM to MP4
- 01Drop a WebM video into the box, or click it to choose one.
- 02MP4 is already selected under Convert to.
- 03Click Convert to MP4 and keep the tab open until it finishes.
- 04Play the result, then download the MP4.
Good to know
No upload
The video is converted by your browser and never leaves your device.
H.264 + AAC
The most widely supported combination, for phones, chat apps and editing software.
Quality kept
The bitrate is set from the original video's, with extra room for H.264, so it looks the same for most clips.
Frequently asked questions
Is my video uploaded?
No. It's converted in your browser and never leaves your device.
Why does WebM to MP4 take longer than MOV to MP4?
WebM videos use VP8, VP9 or AV1, which most MP4 players don't support, so the video has to be re-encoded to H.264 rather than copied.
Can I keep the VP9 video instead?
Yes. Turn on "Keep H.265 / VP9 / AV1 video". It's faster, but some phones and apps won't play VP9 inside an MP4.
Can I convert to other formats?
Yes. Choose WebM, MOV or MKV under Convert to. This page only starts with MP4 selected.