Convert WEBM to MP4
WEBM to MP4 converter that runs entirely in your browser. 100% free, no signup, no upload — your files never leave your device. One-click batch conversion.
WebM plays beautifully in browsers, but many phones, TVs, editors, and social apps still expect MP4. Converting WebM to MP4 re-encodes VP8/VP9 video to the universally supported H.264 + AAC combo. It's the fix when a screen recording or downloaded web video refuses to open on your device.
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All file types supported
About formats
WEBM
WEBM is an open, royalty-free multimedia container designed for the web, sponsored by Google. It is based on the Matroska profile and pairs the VP8/VP9 or AV1 video codecs with the Opus or Vorbis audio codecs. WEBM is built for HTML5 video playback and is supported natively by Chrome, Firefox, Edge and most modern browsers.
- Developer
- Initial release
- 2010
- Compression
- Lossy
- Color depth
- up to 12-bit HDR
- Transparency
- No
- Animation
- Yes
Best for
- Embedding video in HTML5 pages
- Web-native video streaming
- Royalty-free video delivery
- Browser-based video playback
- Open-source video projects
Pros
- +Royalty-free and open format
- +Native HTML5 playback in modern browsers
- +Pairs VP8/VP9/AV1 with Opus/Vorbis
- +Efficient compression for web delivery
Cons
- −Limited support in Safari historically
- −Fewer hardware decoders than H.264
- −Less common in professional editing tools
MP4
MP4 (MPEG-4 Part 14) is a digital multimedia container format standardized by the Moving Picture Experts Group (MPEG). It stores video, audio, subtitles, and still images in a single file and is the most widely used format for streaming and sharing video across the web, mobile devices, and living-room hardware. MP4 offers an excellent balance between compression efficiency and quality, typically using the H.264 or H.265 (HEVC) video codec together with AAC audio. Its near-universal support makes it the default choice for social media platforms, browsers, phones, and modern TVs.
- Developer
- ISO/IEC (MPEG)
- Initial release
- 2001
- Compression
- Lossy
- Color depth
- up to 12-bit HDR
- Transparency
- No
- Animation
- Yes
Best for
- Sharing videos on social media
- Streaming video over the web
- Playback on phones and tablets
- Storing H.264 or HEVC video
- Distributing downloadable video clips
Pros
- +Near-universal support across devices and browsers
- +Excellent compression-to-quality ratio
- +Supports subtitles, chapters, and metadata
- +Hardware-accelerated decoding on most devices
Cons
- −Patent-encumbered H.264/HEVC codecs
- −Not ideal for lossless archival
- −Editing streams can require re-muxing
How to convert WEBM to MP4
- 1
Select WEBM files from your computer, Google Drive, Dropbox, a URL, or by dragging them onto the page.
- 2
Choose mp4 — or any other format you need as a result (more than 200 formats supported).
- 3
Let the file convert, then download your mp4 file right away.
WEBM vs MP4
| Property | WEBM | MP4 |
|---|---|---|
| Compression | Lossy | Lossy |
| Color depth | up to 12-bit HDR | up to 12-bit HDR |
| Multi-track | Yes | Yes |
| DRM support | No | Yes |
| Open format | Yes | No |
When to use WEBM vs MP4
WEBM
- Embedding video in HTML5 pages
- Web-native video streaming
- Royalty-free video delivery
- Browser-based video playback
- Open-source video projects
MP4
- Sharing videos on social media
- Streaming video over the web
- Playback on phones and tablets
- Storing H.264 or HEVC video
- Distributing downloadable video clips
Use cases for WEBM → MP4
- Embedding video in HTML5 pages
- Web-native video streaming
- Royalty-free video delivery
- Browser-based video playback
- Open-source video projects
- Sharing videos on social media
- Streaming video over the web
- Playback on phones and tablets
- Storing H.264 or HEVC video
- Distributing downloadable video clips
Frequently Asked Questions
Is converting WEBM to MP4 free?
Which devices and platforms can I use to convert WEBM to MP4?
Are my WEBM files uploaded to a server?
Can I convert multiple WEBM files at once?
What is the maximum file size?
Will converting WEBM to MP4 reduce the quality?
Does MP4 support transparency?
How will the file size change after converting WEBM to MP4?
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100% Free
No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.
No Signup Required
Start converting immediately without creating an account or sharing email address.
Private & Secure
Your files never leave your device. All processing is completed locally for maximum privacy.
Batch Conversion
Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.
Runs in Browser
Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.
200+ Formats
Supports a wide variety of formats including images, documents, audio, video, and more.
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