Convert any WebM file to MP4 — free, private, entirely in your browser.
Click "Start Converting — Free" to launch the converter in your browser.
Drag and drop your WebM file or click to browse. Choose MP4 as the output format.
Conversion runs locally via WebAssembly. Download your MP4 file instantly.
Files never leave your device. WebM→MP4 conversion is 100% client-side.
No registration, no watermarks, no usage limits — ever.
Uses open-source FFmpeg compiled to WebAssembly for native-speed conversion.
Works in Chrome, Firefox, Edge, and Safari on desktop and mobile.
Convert multiple files using the built-in queue without reloading the page.
Yes. AnyConvert uses open-source FFmpeg via WebAssembly — no cost, no sign-up, no limits.
No. All conversion happens in your browser using WebAssembly. Your files never leave your device.
There is no server-side limit. The practical limit depends on your device's available memory — most files under 500 MB work fine.
While WebM is great for web browsers, MP4 offers far broader compatibility with devices, media players, and video editing software.
Open AnyConvert in your mobile browser, select your WebM file, choose MP4 as output, and download. No app needed.