webtrees

webtrees lets individuals and families host a collaborative genealogy site on any PHP‑ and MySQL‑enabled web server. It reads standard GEDCOM files, so data can be exchanged with any major desktop genealogy program, and provides web‑based viewing and editing of family trees, including photos, documents, and other media. Users can define privacy rules to control who sees which parts of the tree, enabling extended family members to contribute while keeping sensitive information restricted.

The software is released under the GPL‑3.0 license, is free to use, and can be self‑hosted without any subscription fees. Its development follows PHP Standards Recommendations and includes extensive automated testing and code‑quality tools, ensuring a stable, maintainable codebase. The project is community‑driven, with contributors worldwide providing ongoing improvements and support through forums and documentation.

Typical users are hobbyist genealogists, family history societies, or anyone who wants an online, shareable family tree that can be edited collaboratively and accessed from any browser while retaining full control over data privacy and hosting.