Opus downloads

Even though Opus is now standardized by the IETF, this Opus implementation will keep improving in the future. Of course, all future versions will still be fully compliant with the Opus IETF specification.
See the development page for the latest development information.

Development binary builds

In addition to support in Firefox, Mozilla provides binary builds of Opus utilities.

Opus-tools provides command-line utilities to encode, inspect, and decode .opus files.

Source code (stable release)

Source code (development releases)

See the news archive for all releases