Penrose
Turn structured notation into diagrams for an explainer, technical article or teaching material.
What’s included for free?
Free open-source diagram platform with a browser editor and local source. Requires learning Domain, Substance and Style notation; this is a constraint-based diagram tool, not a general drag-and-drop graphics editor.
Where it runs: Browser
Provider information ↗Checked 2026-10-14
Before you use it
MIT software licence; retain copyright and permission notices when redistributing. Imported assets have their own rights.
Provider terms can change. Check current pricing and usage rights before starting a project.