MKV to WebM Converter
Convert MKV videos to web-optimized WebM for HTML5 streaming.
Video Converter
Convert videos between different formats (powered by WebCodecs)
Why Convert MKV to WebM?
MKV and WebM are closely related formats (WebM is a subset of Matroska), but WebM is specifically designed for web delivery. Converting MKV to WebM produces files optimized for HTML5 video playback with VP8/VP9 codecs and smaller file sizes ideal for streaming.
Features
100% Private
Files never leave your device. All processing happens in your browser.
Instant Conversion
No waiting for server uploads. Convert MKV to WebM in seconds.
Free & Unlimited
No signup, no limits, no watermarks. Convert as many files as you need.
Batch Support
Upload multiple files and convert them all at once with consistent settings.
Frequently Asked Questions
What is the difference between MKV and WebM?
WebM is actually a subset of the Matroska (MKV) container. WebM restricts codecs to VP8/VP9 video and Vorbis/Opus audio, making it a standardized format for web delivery.
Why convert MKV to WebM?
While MKV can contain any codec, WebM uses web-standard codecs that browsers support natively. This makes WebM ideal for embedding videos on websites and web applications.
Will the file size be smaller?
Typically yes. WebM VP9 offers excellent compression, so files are usually smaller than MKV files encoded with older codecs. The reduction depends on the original encoding.
Is WebM good for streaming?
Yes. WebM was designed specifically for web streaming and works natively in all major browsers. It is an excellent choice for self-hosted video content.
Are my files kept private?
Yes. All conversion processing happens in your browser. No files are uploaded to any server at any point.
How It Works
This converter uses your browser's built-in WebAssembly to process files locally. Your MKV files are decoded and re-encoded as WebM entirely on your device. Nothing is uploaded to any server.
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