WEBM Converter
Free WEBM converter that runs entirely in your browser. No upload, no signup — convert to WEBM or from WEBM into 200+ supported formats in one click.
Drop any file here or click to browse
All file types supported
About WEBM
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
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
How to convert with the WEBM converter
- 1
Choose the WEBM file you want to convert from your PC, Mac or mobile device, or simply drag and drop it onto the page.
- 2
When your file is uploaded, the output format is preset to WEBM. You can add more files to batch-convert them together.
- 3
Click the gear icon and tweak codec, quality, resolution or other options if you need them, then apply to all files if you want.
- 4
Click the Convert button. When conversion completes, download the result to your computer or save it back to Google Drive / Dropbox.
Frequently Asked Questions
What is a WebM file?▼
WebM is Google's open video format designed for the web — VP8/VP9 or AV1 video with Vorbis or Opus audio. It streams efficiently in HTML5 video and is royalty-free.
Why convert WebM to MP4?▼
WebM support is strong in browsers but patchy in editing apps, TVs, and players. Converting to MP4 makes the video usable everywhere, often with H.264 video for maximum compatibility.
Is WebM better than MP4?▼
Per byte, modern WebM (VP9/AV1) often beats H.264 MP4 in quality. But MP4's hardware and player support is far broader, so MP4 remains the safer universal pick.
Does WebM work in all browsers?▼
Modern Chrome, Firefox, and Edge play WebM; older Safari versions do not. For broad Safari support, also provide an MP4 version.
Are my videos uploaded when converting?▼
Never. Conversion runs locally in your browser — nothing leaves your device.
Supported Conversions
Specific converters
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.
WEBM Converter Quality Rating
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