The World Legal Information Institute or WorldLII is a free legal information research database covering case law, legislation and other materials from 48 jurisdictions in 20 countries around the world.

It provides a single search facility for databases located on AustLII; BAILII; CanLII; HKLII; LII (Cornell); and PacLII as well as its own databases not found on other LIIs.

WorldLII is coordinated by AustLII, and is a member of the Free Access to Law movement.