Online Video to WebM Converter
Free online video to WebM converter: convert MP4/MOV and more to WebM entirely in your browser — no upload, no limits.
About Video to WebM Converter
WebM is an open, royalty-free video format ideal for the web. This converter re-encodes your video to WebM right inside your browser, so the file never leaves your device.
How to use Video to WebM Converter
- Drop a video file (MP4, MOV, AVI, …) into the upload area.
- Click Process video — the file is re-encoded to WebM.
- Download the converted WebM.
Frequently asked questions
Is Video to WebM Converter really free?
Yes — Video to WebM Converter is completely free, with no account, no watermark, and no usage limits. It runs entirely in your browser.
Are my files uploaded to a server?
No. All processing happens locally on your device using WebAssembly. Your files never leave your computer — close the tab and nothing remains.
Which browsers are supported?
Any modern browser on desktop or mobile: Chrome, Firefox, Safari, and Edge.
Related tools
Video Muter
Strip the audio track from a video without re-encoding (stream copy).
runs locallyVideo Reverser
Reverse a video so it plays backwards — frames and audio both flipped.
runs locallyVideo Compressor
Shrink a video's file size by re-encoding it — choose the size/quality balance.
runs locallyVideo Cutter
Cut a segment out of a video without re-encoding (stream copy).
runs locallyVideo Frame Extractor
Grab a single frame from a video at any timestamp and save it as a JPG image.
runs locallyVideo Speed Changer
Change a video's playback speed — speed it up or slow it down — with audio kept in sync.
runs locally