Compression

Compression shrinks text responses such as HTML, JSON and XML so they travel faster and cost less to deliver. Gzip is supported almost everywhere, and Brotli often produces smaller files for clients that ask for it. This tag collects guides about compressing RSS and Atom feeds correctly. Articles explain how clients and servers agree on an encoding, which content types to include and how to configure common servers and networks. They also cover the Vary header, the danger of compressing twice and tests that show whether a feed still validates after compression. The advice helps publishers keep feeds fast and dependable for readers and auto-posting tools.