Convert to WebM
Convert video files to WebM — free, private, runs entirely in your browser.
Convert any video to WebM instantly — free, private, and entirely in your browser. Open format, great compression, universal browser support. No sign-up, no watermarks, no file size limits.
Settings
No data transfer — all data stays on your device!
About the WebM Format
WebM is an open, royalty-free video format developed by Google. It uses VP9 video with Opus audio, delivering excellent compression efficiency. WebM is natively supported in all modern browsers, making it ideal for web video, HTML5 embedding, and bandwidth-conscious applications.
Features
Near-Zero CO₂
Server-based converters upload your file, process it remotely, and send it back — consuming network and data-centre energy on every request. WebConverter runs entirely on your device, so the only energy used is your local CPU. No data transfer, no server electricity.
Install for Offline Use
WebConverter works offline as a Progressive Web App. Click "Add to Home Screen" on mobile or the install button in your browser's address bar. Once installed, you can convert files without any internet connection.
