WebM to MP4 Converter — Free, Online, No Upload
Convert WebM to MP4 for free. Your file is converted on your own device, so it is never uploaded.
How to use WebM to MP4
- Drop your WebM file into the box above.
- MP4 is already selected.
- Convert, preview and download your MP4.
Frequently asked questions
How do I convert WebM to MP4?
Drop your WebM file above and click convert. The MP4 is ready to preview and download in seconds.
Is my file uploaded?
No. The conversion runs inside your browser, so your file never leaves your device.
How do I convert MOV to MP4?
Drop your MOV (for example an iPhone video) above, keep MP4 selected and click Convert. MP4 plays almost everywhere.
Is my video uploaded?
No. Your browser converts it on your device using WebCodecs, so the file never leaves your computer or phone.