tld is an opinionated, flexible diagramming tool with rich featureset to help you visualize, understand, and maintain your software architecture. Inspired by C4 model, designed with multiple opt-in features to answer evolving needs of software teams.
Highlights
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UI: A frontend optimized to handle complex architectures, with intuitive design and polished with tools to manage contextual views.
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Standalone Distribution: A single, dependency-free binary containing both the server and the web application. Available as CLI + WebUI or Native app(windows and macOS).
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CLI that speaks agent: Use the agent skill and use your agent to create a diagram of your codebase with the exact detail level you need. Prompt the agent to add/remove details you see fit.
Here are some examples that were generated using the agent skill.
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Editor and Github Integration: Jump to the code in your editor or Github from diagrams, or open the code symbol in diagram from your editor to visualize the code using the VSCode extension.
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Mermaid Integration: Paste your mermaid diagrams into canvas to import them or export as mermaid for quick sharing.
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Markdown Notes Support: Add notes and documentation for your diagram or link an existing one, preview and edit diagrams and markdown side-by-side.
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Bi-directional Sync: (Experimental) Seamlessly sync changes between your local YAML files, the self-hosted web UI, and the cloud version at tlDiagram.com.
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Git diff visualization: (Experimental) Sync and visualize the changes you or your agent are making live in diagram form. Inspect the dependencies and intervene when necessary.
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Diagrams as Code: (Experimental) A git/terraform like workflow (plan/apply) to manage architectural evolution alongside your source code.
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Automated Codebase Analysis: (Experimental) Built-in tree-sitter integration to automatically discover architecture components in Go, Java, Python, C++, and TypeScript (more soon™ (hopefully)).
Quick Start
macOS and Linux
curl -LsSf https://tldiagram.com/install.sh | sh -s serve --open
Windows
powershell -ExecutionPolicy ByPass -c "irm https://tldiagram.com/install.ps1 | iex; tld serve --open"
Documentation
Visit docs for more info.
Deployment & Self-Hosting
tld has native-desktop builds for macOS and windows. Look for tld-desktop binaries in releases.
tld designed to be run fully offline, behind a reverse-proxy or in your infrastructure or as a local development tool.
Run tld serve to start a local SQLite-backed instance, or configure PostgreSQL in ~/.config/tldiagram/tld.yaml or via env vars
export TLD_DB_DRIVER=postgres
export TLD_DATABASE_URL='[REDACTED:DB Connection String]
export TLD_PUBLIC_URL='https://example.com'
export TLD_HOST=127.0.0.1
export PORT=8060
tld serve
The PostgreSQL database must have pgvector support.
Mobile
