GaitherDyn Decision Tree Builder

Type an indented outline. Get a clean decision tree. Export to PNG, SVG, Mermaid, or Markdown. Free, runs in your browser, no account required.

How it works

  1. Type one node per line in the editor.
  2. Indent with two spaces to create a child branch under the previous line.
  3. Add a connector label by wrapping it in square brackets at the start of a child line, such as [Yes], [No], or [Maybe].
  4. Pick a theme: Midnight, Blueprint, Daylight, Slate, Sunset, or Mono.
  5. Choose vertical or horizontal layout.
  6. Export PNG or SVG for slides, or Mermaid and Markdown for docs.

Features

  • Live preview rendered alongside the outline editor.
  • Six visual themes, three light and three dark.
  • Vertical or horizontal node orientation.
  • Undo and redo with full edit history.
  • Save and reopen trees from your browser. Nothing is sent to a server.
  • Share by URL: the tree is encoded into a link you can paste anywhere.
  • Keyboard-first editing with click-through navigation on the canvas.

Common uses

  • Policy logic and eligibility flows for case workers and benefits navigators.
  • Troubleshooting guides and incident response runbooks.
  • Customer support routing and triage scripts.
  • Software architecture and data flow diagrams.
  • Onboarding flows, approval chains, and process maps.
  • Teaching tools for branching logic and conditional reasoning.

Frequently asked questions

Is the decision tree builder free?

Yes. It is built and operated by Gaither Dynamic. There is no paywall and no signup.

Do you store my trees?

No. Trees are saved in your browser's local storage. The site has no backend database and the server never sees your content.

Can I share a tree with someone else?

Yes. The Share button generates a URL that encodes the entire tree. Anyone with the link can open, edit, and re-export it.

What export formats are supported?

PNG and SVG for image use. Mermaid source for embedding in documentation sites. Markdown nested lists for plain-text contexts and pull requests.

Who built this tool?

Gaither Dynamic builds data dashboards and decision tools for Continuums of Care, local governments, and service providers. The decision tree builder is part of a small network of free utilities.

Loading the decision tree builder.