Convert WebM to MP4 instantly in your browser - no upload needed
WebM is a browser-native video format, but many devices, video editors and media players don't open it natively. Converting to MP4 gives you universal compatibility - playable on phones, TVs, social media platforms and virtually any software. This tool runs entirely in your browser, so your files stay private and are never uploaded.
or click to select a file
🔒 Your files never leave your device - 100% private & secure
Drag a WebM file onto the upload area or click Select Video. Other video formats such as MKV, MOV and OGV are also accepted.
MP4 is selected automatically. Optionally adjust quality via the Advanced toggle, then click Convert. Everything runs locally in your browser - your file is never uploaded. When it is done, download the MP4 file.
WebM was designed for the web and works well inside browsers, but outside the browser its support is limited. Many smartphones, smart TVs, game consoles and video editors either refuse to open WebM files or require extra plugins. MP4 with H.264 video is the most widely supported video format in the world - it plays natively on virtually every device, operating system and media player. Converting your WebM files to MP4 ensures they can be shared, edited and played anywhere without compatibility issues.
Drop or select your WebM file on this page, choose MP4 as the output format, then click Convert. The conversion runs entirely in your browser - no upload, no signup, no cost. When it finishes, click Download to save your MP4 file.
If you keep the quality set to Original, the output uses the same bitrate as your source file so the visual quality stays as close to the original as possible. You can also choose High, Medium or Low to reduce the file size at the cost of some detail. The exact bitrate for each option is displayed so you can decide before converting.
There is no hard limit. The practical limit depends on your device's available memory. Most modern computers handle files up to several gigabytes without issues. Because everything runs locally, there is no upload or server-side restriction.
No. Your files never leave your device. VidShift has no backend servers that receive or store your media. All conversion runs locally in your browser using WebAssembly, ensuring complete privacy. The tool even works offline after your first visit.
Need to compress the video too? Use our Video Compressor
Want to trim the video first? Use our Video Trimmer
Need to extract audio instead? Use our MP4 to MP3 tool