FileTranslator › WebM to MP4
Convert WebM to MP4
Browser-based screen recorders and many web tools output WebM — which video editors like Premiere and iMovie, plus iPhones, often refuse to open.
Drop WebM files here
or
Output is pre-set to MP4 — you can change it per file after adding.
About WebM to MP4 conversion
Conversion to H.264 MP4 makes the recording editable and shareable everywhere. It runs through FFmpeg in your own browser, so demos and meetings are never uploaded.
Good to know: Re-encoding is CPU-heavy and runs at roughly real-time speed or slower. Keep the tab open during conversion.
How to convert WebM to MP4
- Drop your WebM file onto the box above, or click Choose files.
- The output format is already set to MP4 — adjust it per file if you need something else.
- Click Convert, then download your MP4 file.
Free, no account, no watermarks — and because the conversion runs in your browser, your files are never uploaded to a server.
WebM to MP4 — frequently asked questions
How do I convert WebM to MP4?
Drop your WebM file onto the converter above (or click Choose files), make sure the output format is set to MP4 — it is preselected on this page — then click Convert and download the result.
Is this WebM to MP4 converter free?
Yes. Converting WebM to MP4 on FileTranslator is completely free, with no account, no file limit and no watermarks. The site is supported by ads instead of fees.
Are my WebM files uploaded to a server?
No. The conversion from WebM to MP4 runs entirely in your browser using WebAssembly and JavaScript — your files never leave your device, which makes it safe for private documents and photos.
What should I know before converting WebM to MP4?
Re-encoding is CPU-heavy and runs at roughly real-time speed or slower. Keep the tab open during conversion.