Welcome to Hoogle

Hoogle is a Haskell API search engine, which allows you to search the Haskell libraries on Stackage by either function name, or by approximate type signature.

Example searches:

map

(a -> b) -> [a] -> [b]

Ord a => [a] -> [a]

Data.Set.insert

+bytestring concat



Enter your own search at the top of the page.

The Hoogle manual contains more details, including further details on search queries, how to install Hoogle as a command line application and how to integrate Hoogle with Firefox/Emacs/Vim etc.

I am very interested in any feedback you may have. Please email me, or add an entry to my bug tracker.