Freebase is an open, Creative Commons licensed graph database with more than 22 million entities.

An entity is a single person, place, or thing. Freebase connects entities together as a graph.

Ways to use Freebase:

• Use Freebase's Ids to uniquely identify entities anywhere on the web
• Query Freebase's data using MQL
• Build applications using our API or Acre, our hosted development platform

Freebase is also a community of thousands of data-lovers, working together to improve Freebase's data. Learn how to contribute, join our mailing list, or find out more on our community page.

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User Guide

• Freebase web client
• Create a new topic - Band, Book, Company, Person, etc.
• Edit topics
• Create a schema
  • Types and Properties
  • Domains and Bases
  • Metaschema
• The Freebase Commons
• Load data
• Challenges
• Review Queue
• Data games

About Freebase

• Freebase data
• Freebase research
• Freebase platform
• Freebase community
• History of Freebase
• Freebase license
• Terms of Service
• FAQ
• Glossary
• In the news

Developer Documentation

Tools & Resources

• Freebase API -- A collection of RESTful web services that give you access to Freebase data.
• MQL -- The Metaweb Query Language
• Acre -- Acre is Freebase's hosted app development platform .
• RABJ -- A human judgement queueing infrastructure used for data gardening and QA tasks.
• RDF -- Access Freebase data in the RDF format

Building apps using Freebase data

• Data dumps -- Freebase provides regular downloads of the entire corpus.
• Data linkage guidelines
• Libraries
• Sample code snippets
• Freebase Suggest - Add Freebase entities to any web page.

Other things to know about

• Sandbox
• Write quotas
• The Freebase Developer Community
• The new Freebase Site