Convert WEBM to MP4
Free, fast and secure — convert WEBM to MP4 right in your browser.
WEBM
MP4
Convert WEBM to MP4 with a solid background
Converting WEBM to MP4 flattens transparency onto a solid background, producing a MP4 video that displays consistently wherever transparency is not supported.
How to convert WEBM to MP4
- 1 Drop your WEBM file into the converter above.
- 2 It is converted to MP4 automatically — no settings to fiddle with.
- 3 Download your new MP4 file instantly.
WEBM vs MP4
| Feature | WEBM | MP4 |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | Yes | No |
| Animation | Yes | Yes |
| MIME type | video/webm | video/mp4 |
| Best for | Embedding fast-loading video on websites and web apps. | Sharing, streaming and uploading video anywhere with maximum compatibility. |
About the formats
WEBM
WebM video
WebM is an open, royalty-free format built for the web. It streams efficiently in modern browsers and supports transparency, making it a favourite for HTML5 video.
Strengths
- Optimised for web streaming
- Open and royalty-free
- Supports alpha transparency
Limitations
- Limited support outside browsers
- Not ideal for editing
- Less common on mobile apps
Best for: Embedding fast-loading video on websites and web apps.
MP4
MP4 video
MP4 (H.264) is the universal video container. It balances quality and file size beautifully and plays on virtually every device, browser and platform.
Strengths
- Plays almost everywhere
- Great quality-to-size ratio
- Ideal for streaming and social media
Limitations
- Lossy compression
- Less flexible than MKV for multiple tracks
- Older codecs can look dated
Best for: Sharing, streaming and uploading video anywhere with maximum compatibility.
Frequently asked questions
Upload your WEBM file above and it is converted to MP4 automatically. When it is ready, download your new MP4 video — the whole thing takes just a few seconds in your browser.
Converting WEBM to MP4 flattens transparency onto a solid background, producing a MP4 video that displays consistently wherever transparency is not supported.
Converting between compressed formats can introduce minor changes, but our converter keeps your MP4 looking as close to the original as possible.
Yes. The converter is free to use, with no watermark and no sign-up required.
Your files are processed securely and are never shared with anyone.