MP4 to WebM Converter
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How to Convert MP4 to WebM Online
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1. Upload your MP4 video
Click "Upload file" or drag and drop your MP4 file directly into the converter
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2. Choose WebM as output
WebM format is selected by default with VP9 compression. Adjust quality or resolution if needed
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3. Download your WebM file
Click "Convert" and download your optimized WebM video. Ready for web embedding or HTML5 video!
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Up to 50% smaller file size
WebM with VP9 compression creates files up to 50% smaller than H.264 MP4 at the same quality. Faster page loads, lower bandwidth costs — perfect for websites and blogs.
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Native browser support
WebM plays natively in Chrome, Firefox, Edge, and Opera without plugins. Royalty-free and open source — no licensing fees for your website or app.
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No software installation
Convert MP4 to WebM directly in your browser — on desktop, laptop, tablet, or phone. 100% free, no registration required.
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FAQ
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WebM offers smaller file sizes than MP4 with excellent quality — perfect for web embedding, HTML5 video, and faster page loads. It's also royalty-free with native browser support.
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Chrome, Firefox, Edge, and Opera support WebM natively. Safari added WebM support in macOS Big Sur and iOS 14+. For older Safari, provide an MP4 fallback.
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Yes! Our MP4 to WebM converter is completely free with no hidden fees. Convert unlimited files without watermarks or registration.
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For web use, often yes! WebM files are typically 25-50% smaller than MP4 at similar quality. Smaller files = faster page loads and better SEO. Many sites use both formats for compatibility.
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VP9 is Google's open-source video codec used in WebM. It offers better compression than H.264 (used in MP4), meaning smaller files at the same quality. YouTube uses VP9 for most videos.
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Yes! Our converter works on all devices — iPhone, iPad, Android, Windows, and Mac. Just use your mobile browser.