One2Tree is a free Chrome extension developed by NordeboApps that allows users to view pedigree trees in an interactive ahnentafel list and pedigree chart. It is compatible with popular genealogy websites such as Ancestry, MyHeritage, and FamilyTreeDNA.

With One2Tree, users can easily navigate through their family trees and find specific individuals along with their ancestors and descendants. The interactive ahnentafel list provides a quick and easy way to search for persons within the tree. Additionally, the pedigree chart is expandable and contractible, allowing users to explore their family history visually.

One2Tree also offers the ability to save the list as a CSV, HTML, text, or GEDCOM file, providing users with the flexibility to export and share their genealogical data.

To use One2Tree, simply click on the extension icon when you have loaded the tree on Ancestry, MyHeritage, or FamilyTreeDNA. On MyHeritage and FamilyTreeDNA, make sure you are in the pedigree view. Choose the maximum number of generations and click the Go! button. One2Tree will then open a new tab and load the list for you. In case the loaded tree is different from the one you had on your active browser tab, simply reload the page and try again. Note that loading large trees may take some time.

Please note that the free trial version of One2Tree is limited to viewing up to 4 generations. One2Tree assures users that it does not use, distribute, or store any information outside of its intended use.

For any further inquiries, you can contact the developer at