DrillFlow

Local-first diagram editor with native drill-down navigation: every node can hold its own sub-diagram. Free, in your browser, no account needed.

DrillFlow is a diagram editor where every node can open into its own sub-diagram. An onboarding, an incident runbook, a service map: draw the shape of it, then put the detail inside the step it belongs to. A Mermaid flowchart with subgraphs becomes real levels, not one flat picture. Presentation mode runs the flow as a talk. Sharing uploads a read-only snapshot and gives you a link.