Converter
Video to WebM Converter
Convert Video to WebM locally in your browser. VP9/Opus WebM encoding in your browser.
1Private — files stay local
Add video
MP4, MOV, WebM, MKV, AVI — up to 2 GB per file.
Drop video files or browse
Drag & drop a video file to start.
No files selected yet.
Video transcoding runs via WebAssembly locally. Large files may take a while.
2
Output format & settings
VideoWebM
Transcode video to VP9/Opus WebM.
Large files are slow in WebAssembly and must stay under 2GB.
Frequently asked questions
Quick answers about converting Video to WebM in your browser.
How do I convert Video to WebM?
Add your Video file to the converter, start the conversion, and download the WebM file. Everything runs in your browser.
Is the Video to WebM converter free?
Yes. The Video to WebM converter is completely free with no sign-up, no watermarks, and no file count limits.
Are my files uploaded to a server?
No. Your files are read and converted locally in your browser, so they never leave your device.
What devices and browsers are supported?
It works in any modern browser on desktop, laptop, tablet, or phone — there is nothing to install.
Are there any limitations?
Large files are slow in WebAssembly and must stay under 2GB.