Convert WEBM to MP4
WEBM is great for web video, HTML5 players and screen recordings, but MP4 is the better choice for sharing video anywhere — phones, social media, web and TVs. Convert WEBM to MP4 in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert WEBM to MP4
- 1
Tap Choose files and select one or more WEBM files (or drag them in).
- 2
Check that MP4 is selected. Use Advanced options for resolution, size or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your MP4 downloads automatically. Converting several files? Grab them all as a ZIP.
WEBM vs MP4
Both formats are lossy, so the video is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| WEBM | MP4 | |
|---|---|---|
| Full name | WebM Video | MPEG-4 Part 14 |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Developed by | MPEG | |
| Introduced | 2010 | 2001 |
| Plays on iPhone | ◐ Partly / with an app | ✓ Yes |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ◐ Partly / with an app | ✓ Yes |
About WEBM and MP4
WEBM: WebM is Google's open video format using VP8/VP9 and Opus. It is built for the web and is what screen recorders and browsers produce.
MP4: MP4 is the universal video format. With H.264 video and AAC audio it plays on every iPhone, Android phone, smart TV, browser, WhatsApp, Instagram and YouTube.
Frequently asked questions
How do I convert WEBM to MP4 on my phone?
Will converting WEBM to MP4 reduce quality?
Is this WEBM to MP4 converter free?
Are my files uploaded to a server?
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