Why does a couple share one box?

Every line then means parent to child and the chart does not tangle. You can give each person a box and join them with ---, but the number of lines doubles.

Will a large family fit?

Yes, but splitting by branch reads better: one chart per pair of grandparents, plus an overview chart that links the branches.

Is my family's information uploaded?

Drawing and exporting happen in your browser and the content is not uploaded. Anyone you give a share link to can see what is on the chart.

Family tree chart template

Previewed in the “Paper” theme; you can switch themes in the editor

When to use it

Use it to sort out who is who before a family reunion, for a school family tree project, or as a first sketch before serious genealogy research. Each couple shares one box and children connect down from their parents' box, so every row is one generation and the chart stays easy to edit.

Make it yours

Replace the labels with real names, or use two lines such as Grandpa Joe<br/>1941.
For more siblings, add boxes and draw a line down from the parents' box to each.
Think before publicly sharing full names and birth dates of living relatives.

Mermaid code

family-tree-chart.mmd

flowchart TB
    PG[Grandpa Joe · Grandma Ruth] --- UN[Uncle Dan · Aunt Mary]
    PG --- FM[Dad · Mom]
    MG[Grandpa Sam · Grandma Ann] --- FM
    MG --- AU[Aunt Liz · Uncle Ray]
    UN --- C1[Cousin Ben]
    FM --- BR[Brother · Sister-in-law]
    FM --- ME[Me · Spouse]
    FM --- SI[Sister]
    AU --- C2[Cousin Zoe]
    BR --- NE[Nephew]
    ME --- DA[Daughter]

Ask an AI for one with this structure

Send the prompt below to ChatGPT or Claude, then paste the whole reply into the editor; the code inside is detected automatically.

prompt.txt

Draw a four-generation family tree with Mermaid flowchart TB syntax. Put each couple in one box with a middle dot between the names. The first generation is two pairs of grandparents. The second is an uncle and aunt on each side and Dad and Mom, whose box connects to both pairs of grandparents. The third is a cousin on each side, a brother and his wife, me and my spouse, and a sister. The fourth is a nephew and a daughter. Connect parents to children with plain lines using --- and use no parentheses in node text. Output only the mermaid code block.

FAQ

Why does a couple share one box?: Every line then means parent to child and the chart does not tangle. You can give each person a box and join them with ---, but the number of lines doubles.
Will a large family fit?: Yes, but splitting by branch reads better: one chart per pair of grandparents, plus an overview chart that links the branches.
Is my family's information uploaded?: Drawing and exporting happen in your browser and the content is not uploaded. Anyone you give a share link to can see what is on the chart.

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Updated 2026-11-11