webtrees is a free open source web-based genealogy application intended for collaborative use.

It requires a web server that has PHP and MySQL installed.

webtrees is a fork of PhpGedView, it was created in early 2010, when a majority of active PhpGedView developers stopped using SourceForge[5][6] due to issues with exporting encrypted software.

On 26 July 2010, a month before version 1.0.0 of webtrees was released, Dick Eastman, who publishes Eastman's Online Genealogy Newsletter, introduced webtrees as "the wave of the future.

"[10] The day version 1.0.0 of webtrees was released, Tamura Jones reviewed and compared Webtrees with PhpGedView.