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Diagrams: Show Me GPT
ListedTurn a plain-English description into Mermaid, PlantUML, or Graphviz diagram code
Conversation starters
- Draw a sequence diagram for a user login flow
- Create an architecture diagram for a microservices backend
- Make a flowchart of a customer support escalation process
- Generate an ER diagram for a blog database schema
"Sequence diagram in 10 seconds. I deleted my Lucidchart subscription the same week."
What is the Diagrams: Show Me GPT?
Diagrams: Show Me is a widely used GPT in the design and creative category that converts plain-English descriptions into diagram code, primarily Mermaid, and renders a preview via a plugin action. It covers flowcharts, sequence diagrams, ER diagrams, class diagrams, Gantt charts, and architecture overviews.
How does it work?
Describe the system, process, or structure you want to visualize. The GPT picks the appropriate diagram type and syntax, generates the source code, and passes it to the helpful.dev rendering action, which returns a preview link and embeddable image URL. The raw source is also shown so you can paste it into any Mermaid-compatible tool.
For data-driven diagrams where the structure comes from an actual schema or dataset, combining this GPT with the Data Analyst GPT is a practical workflow: extract the schema structure with Data Analyst, then pass it to Diagrams to generate the ER diagram. For visual, brand-aligned assets, Canva GPT is the better fit.
When should you use it?
Use the Diagrams GPT for technical documentation, architecture reviews, and onboarding materials where a diagram would communicate faster than prose. It’s particularly useful in engineering contexts where Mermaid diagrams can live directly in Markdown files or wikis without a separate tool dependency.
Frequently asked questions
Which diagram formats does the Diagrams GPT support?
It supports Mermaid (flowcharts, sequence diagrams, Gantt charts, class diagrams, ER diagrams), PlantUML, and Graphviz DOT. Mermaid produces the most reliable output and is the most widely supported format for embedding in GitHub, Notion, and documentation tools.
Can I edit the generated diagram code directly?
Yes. The GPT outputs the raw Mermaid or PlantUML source alongside the rendered diagram link. Copy the source into a Mermaid editor such as mermaid.live, the GitHub markdown editor, or VS Code with the Mermaid extension to adjust labels, directions, or styles.
Does the Diagrams GPT work for large, complex architecture diagrams?
It works best for diagrams with 10-20 nodes. Very large systems often produce output that is technically correct but visually cluttered. For large architectures, ask the GPT to break the system into subsystem diagrams and generate each one separately, then combine them in a documentation tool.