Shionlib is a free, open-source archive focused on visual novels and galgames, offering visitors a searchable, easy-access collection of works. The site describes its service as zero-threshold and provides browsing tools for games, producers, releases, and activities, alongside random discovery and keyword search. Its catalogue lists 25,656 games and 7,395 files, supported by 14.7 TB of storage and reported 24-hour traffic of 1.5 TB.

Shionlib helps users keep up with new releases and recent changes through sections for monthly new works, recent updates, and popular titles. Updates can include fan translations, official translations, patches, and downloadable content. The site also highlights trending games, with rankings refreshed hourly using views, downloads, creation time, and release time. Additional resources include documentation, a command palette, and links to GitHub and Telegram, as well as contact and sponsorship information. Overall, Shionlib serves as a community-oriented catalogue and access point for discovering visual novels and related files.