MP4 vs WebM
Which video format should you choose?
MP4 wins on universal device and browser support. WebM wins on open source and royalty-free. For most general use, pick whichever is more compatible with your existing tools — file size and quality differences are usually small at the same encoding settings.
When to use MP4
Choose MP4 when you need streaming to youtube, vimeo and social media or playback on smartphones and smart tvs. Its strengths: universal device and browser support, and excellent compression-to-quality ratio.
Pros
- + Universal device and browser support
- + Excellent compression-to-quality ratio
- + Small file sizes
- + Supports subtitles and metadata
Cons
- − Lossy compression by default
- − Can require licensing for some codecs
When to use WebM
Choose WebM when you need html5 web video embedding or modern browser-based streaming. Its strengths: open source and royalty-free, and excellent web compression.
Pros
- + Open source and royalty-free
- + Excellent web compression
- + Native support in Chrome, Firefox, Edge
Cons
- − Limited support on iOS and Safari
- − Slower encoding than H.264
- − Less editing software support
Side-by-side
| Aspect | MP4 | WebM |
|---|---|---|
| Full name | MPEG-4 Part 14 | WebM (VP8/VP9) |
| Extension | .mp4 | .webm |
| MIME type | video/mp4 | video/webm |
| Compression | Lossy | Lossy |
| File size | Small▲ | Medium |
| Compatibility | Universal▲ | Modern only |
| Open source | No / partial | Yes |
| Best for | Streaming to YouTube, Vimeo and social media | HTML5 web video embedding |
▲ = generally favored on that aspect. Real-world results depend on encoder settings.
Convert between MP4 and WebM
MP4 vs WebM — Frequently Asked Questions
Is MP4 better than WebM?
Is MP4 better than WebM?
Neither is universally better — they serve different needs. MP4 is stronger for streaming to youtube, vimeo and social media, while WebM is stronger for html5 web video embedding. Pick based on what you're trying to do.
Can I convert MP4 to WebM?
Can I convert MP4 to WebM?
Yes — Zen Convert handles MP4 to WebM conversion for free, directly in your browser. It also handles the reverse (WebM to MP4). No signup, no watermark.
Will I lose quality converting between MP4 and WebM?
Will I lose quality converting between MP4 and WebM?
Both MP4 and WebM use lossy compression. Each conversion adds a small additional loss because the codec re-encodes the audio/video. For best quality, convert once and keep the result.
Which file is bigger : MP4 or WebM?
Which file is bigger : MP4 or WebM?
MP4 files are usually smaller than WebM files at the same quality. The difference depends on encoder settings, but the trend is consistent across most content.
Which one is better supported on phones?
Which one is better supported on phones?
MP4 has broader mobile support. Most phones (iPhone and Android) play it natively without extra apps.