TreeLine shows your family tree as a timeline. Every person is a lifespan bar on one shared time axis.
You see:
- who lived at the same time
- how generations overlapped
- where data is missing (a research to-do list)
- Open TreeLine.
- Load the sample family, or your own GEDCOM file. GEDCOM (.ged) is the standard export format of Geni, MyHeritage, Ancestry and similar tools. The sample family is fictional. It contains no real persons.
- Select a person. You see ancestors, siblings, partners and descendants.
One search field finds:
- People – by name, also by the name after marriage
- Places – where people were born and where they lived
- Notes – words in a person's notes. The note opens with the words highlighted.
Results are grouped: All · People · Places · Notes.
Search accepts typos, missing accents, a different word order and birth years.
Statistics about one person's bloodline: descendants or ancestors. Open a profile and select See fact cards.
You see:
- people per generation, with their birth years
- average lifespan per generation, men and women
- age at death by birth period
- who lived the longest and who had the most children
- children per family, per generation
- top 10 birthplaces, countries and given names
Spouses are not counted. Each card tells you how many people have missing data. One click makes them a research list in Find gaps.
Most genealogy tools show who is related to whom. They do not show when people lived.
A classic tree chart hides that a grandfather and a great-grandchild shared decades, or that siblings were born across 50 years. TreeLine puts time first.
Last updated: 1 November 2026
- Your GEDCOM .ged file stays in your browser. It is not uploaded, sent or saved anywhere.
- No account. No cookies. No analytics code. No server processing.
- Photos linked in the .ged file are never loaded.
- TreeLine saves only your language choice in your browser (localStorage). It is never sent.
- GitHub Pages logs visitor IP addresses for security. The author cannot see these logs. To avoid this, run TreeLine locally. See the GitHub Privacy Statement.
- Search statistics: the author uses Google Search Console and Bing Webmaster Tools, only to help people find TreeLine in search. They show only combined numbers, not who you are. There is no Google or Microsoft code on the page. When you search, the privacy policy of Google or Microsoft applies.
- Full privacy policy: in the app, About → "privacy policy", or the link at the bottom of the start page.
- Download
index.htmlfrom Releases. - Open it in your browser. No installation. No server.
- One HTML file
- Tested in: Google Chrome
- Current version: 6.49
Free for personal, non-commercial use. Commercial use requires permission.
Report bugs and ideas in Issues.