D2

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About D2

D2 is an open-source diagram scripting language created by Terrastruct for generating diagrams from plain text definitions. The project enables developers, architects, and technical teams to create infrastructure diagrams, flowcharts, sequence diagrams, software architecture maps, and system visualizations using a clean declarative syntax. D2 includes multiple layout engines such as Dagre, ELK, and TALA, supports SVG, PNG, and PDF exports, and provides live preview functionality through its CLI tooling. Built with extensibility in mind, D2 offers plugins, syntax highlighting, autoformatting, editor integrations, and language tooling for scalable diagram management. The ecosystem includes official integrations for VSCode, Vim, Obsidian, Slack, and Discord, alongside numerous community plugins and SDKs. D2 is designed for both local and server-side rendering, supports theming and custom fonts, and focuses on maintainable diagrams-as-code workflows for documentation, DevOps, cloud architecture, and software engineering projects.

Key Features

• Text-to-diagram scripting language
• Generate architecture and infrastructure diagrams
• SVG, PNG, and PDF export support
• Live preview and watch mode
• Multiple layout engines including Dagre and ELK
• Plugin-based extensibility system
• CLI-based workflow
• Custom themes and styling support
• Custom font rendering support
• Language tooling and parser diagnostics
• Syntax highlighting and autoformatting
• Server-side rendering support
• VSCode extension integration
• Vim editor integration
• Obsidian plugin support
• Slack and Discord integrations
• Sequence and workflow diagram capabilities
• Diagram-as-code workflow
• Open-source Mozilla Public License 2.0
• Cross-platform installation support

Useful Links