Genealogie Online is a Dutch-language genealogy platform that helps people research their ancestors, explore family histories and share family trees online. The site brings together published genealogical trees and collections, with search tools for finding people, publications, historical records and fellow researchers. Its resources include family-history stories, historical images and scans, population reconstructions, memorial cards, and material about notable families, artists, millers and Second World War victims. Visitors can also consult genealogical standards, research guidance, reference tools and a genealogical dictionary.

Users can publish their own family-tree information to seek feedback and discover possible connections with other researchers’ work. The service may also suggest relevant online scans and photographs, including civil registration records, church registers and gravestones. Genealogie Online offers subscription options, a family-tree PDF wizard, a monthly newsletter and links to related services such as Open Archieven, a platform for searching historical personal records. Presented by Coret Genealogie, the site supports family historians in discovering, documenting and sharing their ancestry while encouraging responsible use of published research.