WebM pairs VP9 or AV1 video with Opus audio in a royalty-free container built for the web. At matched quality it is usually meaningfully smaller than H.264 MP4.
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WebM pairs VP9 or AV1 video with Opus audio in a royalty-free container built for the web. At matched quality it is usually meaningfully smaller than H.264 MP4.
Files never leave your device
Convert instantly in your browser
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This is a full re-encode — video is decoded and compressed again, so some detail is lost. VP9 handles high-motion scenes and flat gradients better than H.264 at the same bitrate.
Safari's WebM support is comparatively recent and still narrower than its MP4 support; iOS in particular is happier with MP4. Encoding is also slower than a straight copy.
Privacy Notice: All MP4 to WEBM conversions are performed locally in your web browser using WebAssembly technology. Your files are never uploaded to our servers, ensuring complete privacy and security. This also means faster conversion speeds and no file size limits from server restrictions.
Modern versions do, but support is less complete than for MP4. Offer both sources in your video element if iOS matters.
Usually, at equivalent visual quality — though the exact saving depends heavily on the content.
Yes! Our converter is completely free with no hidden costs, no file limits, and no watermarks. Convert as many MP4 files to WEBM as you need.
No! All conversions happen directly in your browser using WebAssembly. Your MP4 files never leave your device, ensuring complete privacy and security.
Since conversion happens in your browser, the limit depends on your device's memory. Generally, files up to 500MB work well. Larger files may take longer to process.
Video conversions typically take 10-60 seconds depending on the file size and your device performance.
Currently, you can convert one file at a time. However, since conversions are fast and happen locally, you can quickly process multiple files one after another without any delays.
Quickly convert between the most commonly used video formats. Click any conversion below to start.
Our free video converter is the perfect solution for content creators, video editors, and anyone who needs to convert videos quickly and securely. With support for 36 unique video format conversions, we handle all your video conversion needs - from standard MP4 to specialized formats like WEBM and MKV.
Convert between MP4, WEBM, AVI, MOV, MKV, FLV, WMV, MPEG, and create animated GIFs. Support for all major video platforms and devices.
Choose from Low, Medium, High, Very High, or Original quality settings. Optimize file size vs. quality based on your specific needs.
Convert videos for YouTube, TikTok, Instagram, and other platforms. Create MP4 files optimized for streaming or GIFs for instant sharing.
Videos are processed locally in your browser. No uploads to servers, no tracking, and complete privacy for your video files.
Why choose our video converter? Cloud-based converters upload your files to remote servers, creating privacy concerns and file size limitations. Our tool processes everything locally, offering faster conversions, enhanced privacy, unlimited file sizes, and professional quality output. Perfect for content creators, video editors, and anyone converting videos for streaming, sharing, or editing.