Loading Video Converter Tool...
Fast, private in-browser video conversion to high-efficiency WebM (VP9 + Opus). Your videos stay on your device.
Supports MP4, MOV, WebM, and MKV files. Fast browser-only processing with zero uploads.
Select or drag an MP4, MOV, WebM, or MKV video into the dropzone.
Review detected tracks, select a compression preset, and adjust resolution or audio preferences.
Click Convert to encode your video to WebM in your browser, preview the result, and download.
No. All decoding, processing, and WebM muxing run locally on your device via browser WebCodecs and Web Workers. Zero bytes ever leave your computer or phone.
WebM with VP9 and Opus audio offers excellent compression efficiency, wide browser playback support, and open standards that run reliably in the browser without server dependencies or proprietary codec licensing issues.
Yes. Simply toggle the audio setting to 'Mute' before converting to strip the audio track and reduce file size.
To prevent browser memory exhaustion, videos are limited to 250 MB (10 minutes) on desktop and 100 MB (3 minutes) on mobile devices.
Your files stay on your machine. No server uploads and no file-content tracking.