D2 is a modern, declarative diagramming language that turns text into beautiful diagrams. It focuses on excellent developer experience, auto-layout, and readability.

D2 is generally considered to have a cleaner, more intuitive syntax and superior auto-layout algorithms compared to Mermaid, though Mermaid is older and more widely adopted.

Yes! D2 has extensive support for styling. You can customize colors, strokes, shapes, and shadows directly in the declarative syntax, or use built-in themes.

Your D2 syntax is securely forwarded through our backend proxy to the Kroki rendering engine, which returns a pristine SVG.

Currently, this tool exports directly to SVG format, which is the most versatile format for the web. You can easily convert the downloaded SVG to PDF using standard image tools.

Yes, the D2 DIAGRAM tool is completely free with no usage limits, sign-ups, or subscriptions required.

No. We do not store or log any of the diagrams you generate.

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