A modern diagram scripting language that turns text to diagrams.

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cli.mp4

• What does D2 look like?
• Quickstart
• Install
• D2 as a library
• Themes
• Fonts
• Export file types
• Language tooling
• Plugins
• Comparison
• Contributing
• License
• Related
  • Official plugins
  • Community plugins
  • Misc
• FAQ
• Notable open-source projects documenting with D2

# Actors
hans: Hans Niemann

defendants: {
  mc: Magnus Carlsen
  playmagnus: Play Magnus Group
  chesscom: Chess.com
  naka: Hikaru Nakamura

  mc -> playmagnus: Owns majority
  playmagnus <-> chesscom: Merger talks
  chesscom -> naka: Sponsoring
}

# Accusations
hans -> defendants: 'sueing for $100M'

# Offense
defendants.naka -> hans: Accused of cheating on his stream
defendants.mc -> hans: Lost then withdrew with accusations
defendants.chesscom -> hans: 72 page report of cheating

There is syntax highlighting with the editor plugins linked below.

Rendered with the TALA layout engine.

For more examples, see ./docs/examples.

The most convenient way to use D2 is to just run it as a CLI executable to produce SVGs from .d2 files.

# First, install D2
curl -fsSL https://d2lang.com/install.sh | sh -s --

echo 'x -> y -> z' > in.d2
d2 --watch in.d2 out.svg

A browser window will open with out.svg and live-reload on changes to in.d2.

The easiest way to install is with our install script:

curl -fsSL https://d2lang.com/install.sh | sh -s --

You can run the install script with --dry-run to see the commands that will be used to install without executing them.

Or if you have Go installed you can install from source though you won't get the manpage:

go install oss.terrastruct.com/d2@latest

You can also install a release from source which will include manpages. See ./docs/INSTALL.md#source-release.

To uninstall with the install script:

curl -fsSL https://d2lang.com/install.sh | sh -s -- --uninstall

For detailed installation docs, see ./docs/INSTALL.md. We demonstrate alternative methods and examples for each OS.

As well, the functioning of the install script is described in detail to alleviate any concern of its use. We recommend using your OS's package manager directly instead for improved security but the install script is by no means insecure.

In addition to being a runnable CLI tool, D2 can also be used to produce diagrams from Go programs.

For examples, see ./docs/examples/lib. This blog post also demos a complete, runnable example of using D2 as a library for a real-world use case.

D2 includes a variety of official themes to style your diagrams beautifully right out of the box. See ./d2themes to browse the available themes and make or contribute your own creation.

D2 ships with "Source Sans Pro" as the font in renders. If you wish to use a different one, please see ./d2renderers/d2fonts.

D2 currently supports SVG, PNG and PDF exports. More coming soon.

D2 is designed with language tooling in mind. D2's parser can parse multiple errors from a broken program, has an autoformatter, syntax highlighting, and we have plans for LSP's and more. Good language tooling is necessary for creating and maintaining large diagrams.

The extensions for VSCode and Vim can be found in the Related section.

D2 is designed to be extensible and composable. The plugin system allows you to change out layout engines and customize the rendering pipeline. Plugins can either be bundled with the build or separately installed as a standalone binary.

Layout engines:

• dagre (default, bundled): A fast, directed graph layout engine that produces layered/hierarchical layouts. Based on Graphviz's DOT algorithm.
• ELK (bundled): A directed graph layout engine particularly suited for node-link diagrams with an inherent direction and ports.
• TALA (binary): Novel layout engine designed specifically for software architecture diagrams. Requires separate install, visit the Github page for more.

D2 intends to integrate with a variety of layout engines, e.g. dot, as well as single-purpose layout types like sequence diagrams. You can choose whichever layout engine you like and works best for the diagram you're making.

For a comparison against other popular text-to-diagram tools, see https://text-to-diagram.com.

Contributions are welcome! See ./docs/CONTRIBUTING.md.

Open sourced under the Mozilla Public License 2.0. See ./LICENSE.txt.

We are constantly working on new plugins, integrations, extensions. Contributions are welcome in any official or community plugins. If you have somewhere in your workflow that you want to use D2, feel free to open a discussion. We have limited bandwidth and usually choose the most high-demand ones to work on. If you make something cool with D2 yourself, let us know and we'll be happy to include it here!

• VSCode extension: https://github.com/terrastruct/d2-vscode
• Vim extension: https://github.com/terrastruct/d2-vim
• Obsidian plugin: https://github.com/terrastruct/d2-obsidian
• Slack app: https://d2lang.com/tour/slack
• Discord plugin: https://d2lang.com/tour/discord

• Tree-sitter grammar: https://github.com/pleshevskiy/tree-sitter-d2
• Emacs major mode: https://github.com/andorsk/d2-mode
• Goldmark extension: https://github.com/FurqanSoftware/goldmark-d2
• Telegram bot: https://github.com/meinside/telegram-d2-bot
• Postgres importer: https://github.com/zekenie/d2-erd-from-postgres
• Structurizr to D2 exporter: https://github.com/goto1134/structurizr-d2-exporter
• MdBook preprocessor: https://github.com/danieleades/mdbook-d2
• ROS2 D2 Exporter: https://github.com/Greenroom-Robotics/ros-d2
• D2 org-mode support: https://github.com/xcapaldi/ob-d2
• Python D2 diagram builder: https://github.com/MrBlenny/py-d2
• Clojure D2 transpiler: https://github.com/judepayne/dictim
• JavaScript D2 diagram builder: https://github.com/Kreshnik/d2lang-js
• Maven plugin: https://github.com/andrinmeier/unofficial-d2lang-maven-plugin
• Confluence plugin: https://github.com/andrinmeier/unofficial-d2lang-confluence-plugin
• CIL (C#, Visual Basic, F#, C CLR) to D2: https://github.com/HugoVG/AppDiagram
• D2 Snippets (for text editors): https://github.com/Paracelsus-Rose/D2-Language-Code-Snippets
• Mongo to D2: https://github.com/novuhq/mongo-to-D2

• Comparison site: https://github.com/terrastruct/text-to-diagram-site
• Playground: https://github.com/terrastruct/d2-playground
• Language docs: https://github.com/terrastruct/d2-docs
• Hosted icons: https://icons.terrastruct.com

• Does D2 collect telemetry?
  • No, D2 does not use an internet connection after installation, except to check for version updates from Github periodically.
• Does D2 need a browser to run?
  • No, D2 can run entirely server-side.
• What's coming in the next release?
  • See ./ci/release/changelogs/next.md.
• I have a question or need help.
  • The best way to get help is to ask on D2 Discord
• I have a feature request, proposal, or bug report.
  • Please open up a Github Issue.
• I have a private inquiry.
  • Please reach out at [email protected].

Do you have or see an open-source project with .d2 files? Please submit a PR adding to this selected list of featured projects using D2.

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