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.webm

Web Media

Commonly known as WebM

Open media file format optimized for the web. developed by Google and released in 2010, it has become a standard for HTML5 video, Web background videos.

Key Features

  • Open source (royalty-free)
  • Optimized for HTML5
  • Good transparency support

Limitations

  • Less support on mobile/legacy devices than MP4

When to use WebM?

The WebM format is ideal for HTML5 video, Web background videos. Its MIME type is video/webm.

How to open .webm files

  1. macOS: Use native Preview/Quick Look or import into professional apps that support WebM.
  2. Windows: Open via Photos, Media Player, or dedicated editors by enabling the relevant codec pack.
  3. Browser: Drag the file into FileConvert to transform it into a universally supported alternative before sharing.

Popular Conversions

Convert WebM to...

WebM to MP4
WebM to AVI
WebM to MOV
WebM to MKV
WebM to MP3
WebM to GIF

Convert to WebM

MP4 to WebM
AVI to WebM
MOV to WebM
MKV to WebM
FLV to WebM
3GP to WebM

FAQs about WebM

How do I open a .webm file?

You can open WebM files with native tools on Mac, Windows, and Linux or convert them for free using FileConvert.

Is WebM still relevant in 2025?

WebM remains essential for HTML5 video thanks to its open source (royalty-free) benefit.

How do I convert WebM into other formats?

Visit our WebM conversion directory to switch between Web Media and 200+ alternatives without uploading files.