Convert WEBM to MKV

Converting WEBM videos to MKV format is essential for advanced features like multiple audio tracks and subtitles. WEBM files are modern open-source format with excellent compression, while MKV offers flexible container supporting multiple streams. This conversion is commonly needed for web optimization, HTML5 video, YouTube to high-quality archival, multiple audio tracks, subtitles.

Why Convert WEBM to MKV?

Converting from webm to mkv provides better compatibility and optimization for your specific use case. Our browser-based converter uses FFmpeg.wasm to handle this conversion without uploading files to any server, ensuring complete privacy and fast processing.

How to Convert WEBM to MKV

Simply drag your WEBM files into the upload zone, select MKV as the output format, and click Convert. The tool processes videos locally using FFmpeg compiled to WebAssembly, maintaining quality while converting to MKV format. Download individual files or get everything as a ZIP archive for batch conversions.