Convert WebM to MP4
Free, no watermark, no signup, and your file never leaves your device.
WebM is the web's native video format, what browser-based screen recorders, Discord clips, and many download sites produce. It plays fine in a browser tab and almost nowhere else: iPhones won't open it, video editors ignore it, and upload forms that expect MP4 reject it.
This converter turns the video inside your WebM into an MP4 that plays on effectively every device made in the last decade. The work happens on your own device, so nothing is uploaded and conversion is quick.
Questions people ask
- Why does my screen recorder output WebM?
- Browser-based recorders use the MediaRecorder API, whose default output is WebM. It's efficient to produce in a browser but poorly supported outside one, hence the constant need for this conversion.
- Can iPhones really not play WebM?
- Safari and iOS have no VP8/VP9-in-WebM playback for local files. Converting to MP4 (H.264) is the reliable way to get a WebM clip watchable on an iPhone.
- Is quality lost in the conversion?
- One re-encode pass at high quality is visually indistinguishable for typical screen recordings. Fine text stays legible, screen content compresses well.