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Diagram GPT

The AI Diagram GPT that turns plain English into professional diagrams. Describe any system, process or flow ArchGPT draws UML, architecture, sequence and flowchart diagrams in seconds.

Generate Diagram

Your AI Diagram GPT Alternative

Looking for a DiagramGPT or diagram maker AI that just works? ArchGPT is a free AI diagram generator that takes a plain-text prompt and produces a clean, labelled diagram no dragging, no boxes, no syntax.

Whether you need a UML class diagram, a system architecture diagram, a sequence diagram or a flowchart, simply describe it in English and the Diagram GPT builds it for you, ready to export or edit.

Diagrams You Can Generate

Architecture Diagrams

System, cloud and microservice diagrams from a plain description of your infrastructure.

UML Diagrams

Class, use case, state, activity, object and deployment diagrams with correct UML notation.

Sequence Diagrams

Message flows between services, actors and databases in the correct order.

ER & Flowcharts

Database schemas and process flows generated directly from your prompt.

How It Works

  1. Type your prompt describe the diagram you want in plain English.
  2. AI structures it ArchGPT identifies the elements, connections and layout.
  3. Get your diagram a professional diagram renders in seconds.
  4. Export or edit download as PNG, JPEG, SVG, PDF, or refine it in Draw.io.

Try a prompt: "A microservices system with an API gateway, an auth service, an order service, a Postgres database and a Redis cache. Users request orders through the gateway."

Frequently Asked Questions

Everything you need to know about generating diagrams.

Yes ArchGPT is completely free. Generate unlimited diagrams from text with no subscription or credit card.

No. Write your prompt in plain English and the Diagram GPT handles all the notation for you.

UML class, sequence, use case, state, activity, object, deployment, ER, flowchart, C4 and system architecture diagrams.