PG.CENTER is an online resource for exploring PostgreSQL documentation, technical references, extensions, and the wider PostgreSQL ecosystem. Maintained by the Pigsty team and Ruohang Feng, the site brings version-specific knowledge together to help users find authoritative definitions, follow source references, and understand how features change over time.

Visitors can search the original English manuals, covering releases from PostgreSQL 6.3 through current development versions, and browse version archives, release notes, and comparisons. Its reference library includes SQL commands, data types, functions, operators, system catalogs, configuration parameters, diagnostic information, and tools such as psql. Entries link to the relevant manual version and section, while definitions draw on versioned manuals and PostgreSQL core source.

PG.CENTER also provides a searchable PGEXT extension catalogue with filters for categories, licenses, languages, and repositories, plus dependency, compatibility, package, and project information. Ecosystem resources cover topics including high availability, pooling, backups, monitoring, spatial and time-series data, and distributed PostgreSQL. News, Planet PostgreSQL feeds, community links, and translated documentation help users continue exploring.