WebM to MP4 Converter
Make WebM recordings play everywhere by converting them to MP4. Free and private.
Why convert WebM to MP4?
Screen recorders and browsers often save video as WebM, but plenty of apps, phones, editors and social networks expect MP4. Smushify converts to MP4 with H.264 video and AAC audio, the most widely supported combination there is.
The MP4 files are also prepared for fast start, so they begin playing in a browser before the whole file has downloaded.
How to convert WebM to MP4
Drop your WebM files above. MP4 is preselected; choose a quality and maximum width and click Convert All. Keep the tab open while it works, since the conversion runs on your device. Output is capped at 1920 pixels wide.
Frequently asked questions
Will the MP4 play on my iPhone?
Yes. H.264 video with AAC audio in an MP4 container plays on iPhone, iPad, Android, Windows, macOS and every major browser.
Is the audio kept?
Yes. The audio track is converted to AAC and included in the MP4.
Are my files uploaded anywhere?
No. Smushify converts everything inside your browser using WebAssembly. Your files are never sent to a server, so it is safe for private photos, client work and unreleased videos.
Can I convert many files at once?
Yes. Drop in as many files as you like, use "Format for all" and "Quality for all" to set every file in one go, then click Convert All and Download All.
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