WebM files
A trimmed-down Matroska carrying VP8/VP9 or AV1 video with Vorbis or Opus audio, designed as a royalty-free web format. Browsers play it natively; hardware players often do not.
- Extension
.webm- MIME type
video/x-matroska- Category
- video
- Can convert from
- Yes, via FFmpeg
- Can convert to
- Yes, via FFmpeg
Convert WebM to another format
Convert another format to WebM
Converting WebM files privately
frogConvert runs the conversion engines in your browser as WebAssembly, so a WebM file is read, converted and saved without ever being sent anywhere. That matters most for the files people are least willing to upload: contracts, medical records, unreleased work, anything under an NDA.
It also means the converter works offline. Once the page has loaded, you can turn off the network and keep converting.
Common questions
- Can I open a WebM file without installing anything?
- Yes. frogConvert reads WebM files directly in the browser and converts them to a format you already have software for. Nothing is installed and nothing is uploaded.
- Are my WebM files uploaded to a server?
- No. Every conversion runs locally in your browser through WebAssembly. There is no server to send files to, and the app keeps working with the network disconnected.