Convert to WEBM

Professional video conversion for all devices and platforms.
Convert MP4, AVI, MKV, MOV, FLV and more with customizable resolution and quality settings.

Free tier: 5 conversions/day, files up to 50 MB, ad-supported. Need more? See Pro plans →
  • 256-bit SSL encryptionYour files are protected end-to-end
  • Lightning-fast conversionsProcess files in seconds, not minutes
  • All major video formatsMP4, AVI, MOV, MKV & more
  • No registration requiredStart instantly — 5 free conversions a day
  • Files auto-deleted in 1 hourGDPR-friendly: we never keep your files
File Conversion Illustration

Select or drop a file here

Max file size 50 MB. Sign up for more

Select several files to convert them in one go.

WebM is the open-source video format built for the web, offering excellent quality at small file sizes without licensing fees. Google developed WebM specifically for HTML5 video, making it the royalty-free alternative to H.264.

Convert to WEBM – Free Online WEBM Converter

About the WebM Video (WEBM) Format

Container using VP8/VP9 video and Vorbis/Opus audio. Optimized for web streaming. Open source and royalty-free.

Common Use Cases for WEBM

  • HTML5 video
  • Web streaming
  • Browser playback
  • Open source projects

Pros of WEBM

  • Royalty-free
  • Excellent web support
  • Good compression
  • Fast streaming

Cons of WEBM

  • Limited hardware support
  • Safari compatibility issues
  • Not universal

How to convert files to WEBM

  1. Upload your file using the area above.
  2. Select WEBM as the target format.
  3. Click Start and wait for the conversion to finish.
  4. Download your converted WEBM file.

WEBM Converter — Frequently Asked Questions