Ogg is an open-source file format for multimedia. It can contain music, video, text, and metadata, and is optimized for streaming content. Because it is Copyright-free, Ogg is available for anyone to use in their software or media projects free of charge.

Ogg is developed by the Xiph.org foundation. It is divided into subformats for different media types, including the following.

Codec, File format, Software terms, Streaming