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Supports MP4, MKV, AVI, MOV, WebM and more
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Select codec and quality for your WEBM output
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WebM Video Format
WebM is an open, royalty-free video format developed by Google, optimized for web use. It uses VP9 or AV1 for video and Opus for audio, offering efficient compression ideal for HTML5 video and web applications.
Common reasons to convert to WEBM
Save as WEBM for maximum compatibility across all devices and platforms.
WEBM is widely supported across all major web platforms and social media.
Use WEBM as an intermediate format for video editing workflows.
WEBM plays natively on virtually every smartphone and tablet.
Your files never leave your device. All conversion happens in your browser — no server uploads.
Hardware-accelerated conversion powered by WebCodecs and WebAssembly. Up to 10x faster than server-based tools.
Convert between MP4, WebM, MKV, AVI, MOV, FLV, WMV, TS and more. Any combination, any direction.