WEBM to MP4 Converter
Convert WEBM to MP4 for free, right in your browser – no sign-up and no upload to a server.
Drop your file here
or click to browse
Supported formats: WEBM · Max size: 500 MB
Your file stays on your device – it is never uploaded. Only convert files you own or have the right to use.
WebM recordings (such as Chrome screen captures) are rejected by iPhones, many editors and social networks. Convert WebM to MP4 so it works everywhere.
MP4 (H.264) is accepted by Instagram, TikTok, WhatsApp and almost everything else.
How to convert WEBM to MP4
Choose a file
Drop your WEBM file into the box or click “Choose file”.
Click “Convert”
Conversion runs in your browser, so the file is never sent anywhere.
Download the result
You get a ready MP4 file – download it with one click.
WEBM vs MP4: comparison
| Property | WEBM | MP4 |
|---|---|---|
| Compression | Lossy (VP8/VP9) | Lossy (H.264 / AAC) |
| Quality | Very good | Very good |
| File size | Small | Small to medium |
| Compatibility | Great in browsers; limited on iPhone and older apps | Plays everywhere – phones, TVs, browsers, social networks |
| Best for | Website video, short clips | Web video, social networks, sharing |
Why convert to MP4
- Best compatibility
- Efficient compression
- Accepted by every platform
Good to know about MP4
- Not as open as WebM
What is WebM (VP8/VP9)?
An open Google video format designed for the web. Website video, short clips.
What is MP4 (H.264)?
The most universal video format. Web video, social networks, sharing.
When to choose WebM to MP4
WebM often comes from screen-recording tools or videos recorded in a browser. But many editors, phones and social networks accept MP4, so you usually need to convert before sharing or editing.
Common problems and fixes
- The video has no sound – check whether audio was recorded in the original WebM.
- Screen recordings sometimes have a variable frame rate, which can cause audio and video to drift apart. If that happens, try a different quality preset.
- Conversion in the browser is slower than in desktop software, especially for long or high-resolution clips.
- A file larger than 500 MB is not accepted.
Quality tips
For a smaller file choose 720p or 480p. For screen recordings full of text it is better to keep 1080p so letters stay readable.