File Converter

WebM converter Free, private, no upload.

WebM is an open video format made for the web, using VP8/VP9 video and Opus or Vorbis audio. Convert WebM files to MP4, MOV, MKV, AVI and more, privately in your browser.

or drop files anywhere · paste with Ctrl/⌘ + V

Convert WebM to images

Frequently asked questions

What is a WebM file?

WebM is an open video format made for the web, using VP8/VP9 video and Opus or Vorbis audio. WebM is open, royalty-free and plays natively in web browsers, which makes it a good fit for websites.

What can I convert WebM files to?

MP4, MOV, MKV, AVI, GIF, MP3, WAV, OGG, Opus, AAC, M4A, FLAC, AIFF. Pick a target after adding your files.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.