Convert WEBM to MP4 Online
WebM files are a royalty-free container designed for the web, usually carrying VP8/VP9/AV1 video with Opus audio. Converting to MP4 gives you streaming, social media, mobile playback, archiving everyday video.
How to convert WEBM to MP4
- Upload your WEBM file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose MP4 as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert WEBM to MP4?
People convert WebM to MP4 mainly for compatibility. Native in Chrome, Firefox and Edge; Safari support is limited on older versions. MP4, by contrast, is built for streaming, social media, mobile playback, archiving everyday video, and near-universal support. Typically pairs H.264/H.265 video with AAC audio.
WEBM vs MP4: key differences
| WebM | MP4 | |
|---|---|---|
| File type | open container | lossy container |
| Typical use | HTML5 video, web streaming, YouTube uploads | streaming, social media, mobile playback, archiving everyday video |
| Compatibility | Native in Chrome, Firefox and Edge; Safari support is limited on older versions. | Near-universal support. Typically pairs H.264/H.265 video with AAC audio. |
Tips for a clean WEBM to MP4 conversion
- Native in Chrome, Firefox and Edge; Safari support is limited on older versions.
- Use the highest-quality source WEBM you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original WEBM until you have checked the converted MP4 opens the way you expect.
Frequently asked questions
How do I convert WEBM to MP4?
Upload your WEBM file to the converter on this page, make sure MP4 is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this WEBM to MP4 converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting WEBM to MP4 reduce quality?
MP4 uses lossy compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original WebM if you may need to convert again later.
What is a WEBM file?
WebM is a royalty-free container designed for the web, usually carrying VP8/VP9/AV1 video with Opus audio. Its technical name is WebM and it is typically used for HTML5 video, web streaming, YouTube uploads.
What is a MP4 file?
MP4 is the universal video container, playable on virtually every device, browser, phone and smart TV. Its technical name is MPEG-4 Part 14 and it is typically used for streaming, social media, mobile playback, archiving everyday video.
Can I convert WEBM to MP4 on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.