MP4 to WebM Converter — Free, Online, No Upload
Convert MP4 to WebM for free. Your file is converted on your own device, so it is never uploaded.
How to use MP4 to WebM
- Drop your MP4 file into the box above.
- WebM is already selected.
- Convert, preview and download your WebM.
Frequently asked questions
How do I convert MP4 to WebM?
Drop your MP4 file above and click convert. The WebM 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.