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The documentation for Kotlin is now located on the new site. This page is kept for historical reasons


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Project Kotlin was born in Saint Petersburg, Russia, where one of the main JetBrains' development offices is located. Kotlin is the name of an island situated nearby Saint Petersburg, in the Gulf of Finland, with a beautiful town of Kronstadt build upon the island. The current logo was inspired by the probably imaginary imagined connection of the word "Kotlin" with the word "Kettle", which was originally mentioned in Wikipedia by an unknown authorthe 1911 edition of Encyclopedia Britannica.

Disclaimer 1: We believe that no coffee or other exotic cultures are grown in Kotlin in any noticeable quantities.