Large WebM files are slow to upload, awkward to email, and can blow through chat-app size limits. This tool re-encodes your WebM video (VP9 video, Opus audio) at a smaller size, entirely on your own device — drop a file below, pick a quality level, and download the smaller result.
WebM plays natively in Chrome, Firefox, and Edge; some older Safari versions and non-browser apps may not support it. Because compression runs locally using your browser's built-in WebCodecs hardware encoder, there's no upload wait and no server ever sees your video — the whole process stays on your device from start to finish.
Frequently asked questions
Yes, completely free, with no sign-up and no limit on how many videos or how many times you use it.