MP4 to WebM Converter

Convert MP4 videos to WebM — the open, royalty-free format used widely on the web. Quality and size settings included, and conversion runs fully in your browser.

100% free No uploads Runs in your browser No signup

Convert to WEBM

Drop a file to processProcessed by FFmpeg compiled to WebAssembly — entirely on your device

Video and audio are re-encoded to the open, royalty-free WebM format (VP8 + Vorbis). The 1 Mbps target suits web embedding; contact your quality needs by re-running on the original file.

How to use the MP4 to WebM Converter

1
Open the tool above — it is already running, no install or account needed.
2
Enter your input and adjust the options to match what you need.
3
Copy or download the result — everything was processed locally in your browser.

Private by design

This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.

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