It's a collection of community-maintained help pages that cover command-line utilities and other computer programs.

[5] Romain Prieto started the project by making the first commit on the popular code hosting and version control site GitHub, on 8 December 2013 at 19:56:16 according to the timezone of his personal computer.

[8] On the following day, the project reached the front page of Hacker News.

[12] The default formatting usage of tldr-pages is Markdown, a popular markup language used in many other free software and documentation projects.

[13] To make a contribution to the tldr-pages repository on GitHub, you need to sign the Contributor License Agreement and follow the project's guidelines, which are said to be not strict rules but auxiliary information to keep the simple nature of the pages.