How to use it
- Add your files. Drop WebM files on the page or use Choose files. Folders and ZIPs work too.
- Check that MP3 is selected. MP3 is already chosen on this page.
- Adjust options if you need to. Quality, size and other settings appear when the format has them.
- Convert and download. Press Convert; with several files, “Download all” gives you one ZIP.
What happens to your file
Only the sound track is kept: it is taken out of the WebM and saved as MP3. The video is discarded, so the file is much smaller.
About WebM and MP3
WebM: WebM is the open web video format (VP8/VP9 with Vorbis or Opus sound), made for browsers.
MP3: MP3 is the universal audio format: every phone, car stereo and app plays it.
Questions
Is my WebM file uploaded?
No. The conversion runs inside this browser tab, and the MP3 is created on your device. Nothing is sent to a server.
Is there a file size limit?
No fixed limit: files are processed by your device, so very large videos depend on its memory. Computers handle several GB; phones are best with smaller files.
Can I convert several WebM files at once?
Yes. Drop as many as you like, a folder or a ZIP; “Download all” saves every MP3 in one ZIP.