Convert video format (MP4, WebM)
Convert a video between MP4 and WebM in your browser — no upload, no signup. Lossless when the codecs already fit, so it stays fast and free.
Change a video container from MP4 to WebM or WebM to MP4 without uploading it. When the video and audio codecs already fit the target container, the conversion is lossless and near-instant — nothing is re-encoded, so quality stays perfect. When they don’t fit, the video is re-encoded in your browser. Useful when a site or app only accepts one format, or when you need WebM for the web and MP4 for wider compatibility. Everything runs locally on your device, so your footage stays private. Free, no account, no watermark.
How it works
- Open a video from your device
- Choose MP4 or WebM as the output format
- Convert in your browser — no upload
- Download the converted video