text2diagram
AI diagram generator for flowcharts, ERDs, mindmaps, sequence diagrams, class diagrams, state diagrams, and Gantt charts.
About
text2diagram is an AI diagram generator that turns plain English or chat prompts into diagrams you can edit and export. It can draft flowcharts, sequence diagrams, ERDs, mindmaps, class diagrams, state diagrams, and Gantt charts without requiring Mermaid, PlantUML, or Graphviz knowledge. The tool is built for fast drafting: describe the process, schema, or API flow, let the AI infer structure, then refine the result in a split editor and preview.
What is text2diagram
text2diagram is an AI diagram generator for quickly turning a description into a usable visual. It supports several diagram types, including flowchart, sequence diagram, ERD, class diagram, state diagram, mindmap, and Gantt chart. The app works from plain language or a chat flow, so you can start with a rough idea and let the AI shape the structure. It is free to use, and the site says no signup is required.
The core value of this AI diagram generator is speed. Instead of drawing boxes and arrows by hand, you type a process, schema, or API interaction and get a rendered diagram back. The output is based on Mermaid or markmap source, which makes it easier to edit after generation and easier to move into documentation workflows.
Key features
This AI diagram generator focuses on practical diagram types that show up in engineering, product, and documentation work.
- Multiple diagram families: flowchart, sequence diagram, ERD, class diagram, state diagram, mindmap, and Gantt.
- Plain-language input: describe what you want in one or two sentences.
- Chat mode: ask the AI to clarify actors, events, or edge cases before drawing.
- Auto-detect: Quick mode can classify the prompt and choose a diagram type automatically in about 300 ms, according to the site.
- Live rendering: the app produces valid Mermaid or markmap source and shows a preview immediately.
- Direct editing: you can open the split view and modify the generated source.
- Export options: SVG, PNG, Markdown, and for mindmaps, OPML are supported in the site text.
- Mobile-friendly review: the preview includes zoom, pan, and reset controls on desktop and mobile.
For teams, the AI diagram generator is especially useful because it can add structure from a short prompt. For example, a sequence diagram can show client, gateway, auth service, and database interactions, while an ERD can include keys and cardinality when you describe entities and relationships.
How to use it
Using text2diagram is straightforward, whether you want a quick flowchart or a more careful AI diagram generator session.
- Choose Quick or Chat mode. Quick mode is for one-shot generation; Chat mode is better when you want the AI to ask follow-up questions.
- Describe the diagram in plain language. Examples from the site include a login flow with 2FA, a blog schema ERD, or an OAuth handshake.
- Let the AI infer structure. In Quick mode, the app tries to pick the right diagram type automatically. In Chat mode, it may ask 2–3 questions before drawing.
- Review the live preview. Check whether the diagram matches your intent, then reject any assumption you do not want in Chat mode.
- Edit the source if needed. The split view lets you adjust the Mermaid or markmap text directly, and the preview updates as you type.
- Export the result. Save as SVG for scalable graphics, PNG for slides or docs, Markdown for text workflows, or OPML for mindmaps you want to import elsewhere.
Because this is an AI diagram generator, the best results usually come from clear inputs. Short prompts work well for simple diagrams, while more complex systems benefit from chat clarification.
Who it is for
text2diagram is a fit for people who need diagrams often but do not want to spend time on manual layout.
- Engineers: use the AI diagram generator for API flows, service interactions, database sketches, and class relationships.
- Product managers: turn launch plans, user journeys, and dependencies into diagrams quickly.
- Technical writers: create visuals for onboarding docs, RFCs, and runbooks without learning diagram syntax.
- Students and educators: build mindmaps or structured study notes from a topic outline.
- Anyone documenting a process: from incident response to CI/CD pipelines, if you can describe it, the tool can draft it.
The app is also useful when you are still exploring the shape of a system. Instead of debating notation first, you can use the AI diagram generator to get a draft, then refine the details with the team.
What to know before you use it
This AI diagram generator is helpful, but it is not a substitute for source-of-truth documentation.
- Accuracy depends on your prompt. If you leave out actors, edge cases, or relationships, the AI may infer details you did not intend.
- Mermaid and markmap output still need review. The generated source is editable, but you should check names, cardinality, and transitions before sharing.
- It does not replace official system docs. For production APIs, schema definitions, or compliance-sensitive workflows, verify against the canonical source.
- Complex diagrams may need iteration. Chat mode helps, but highly detailed architectures can still require manual editing.
- Export choices matter. Use SVG for quality scaling, PNG for slides, and Markdown or OPML when you need text-based portability.
In short, text2diagram is best when you want a fast AI diagram generator that gets you from plain language to a usable draft quickly, then lets you polish the result before publishing or presenting.
FAQ
What types of diagrams can I create with text2mermaid?
You can create flowcharts, sequence diagrams, database schemas, and more by describing them in plain English. The AI generates the corresponding Mermaid syntax for you.
Is text2diagram really free?
Yes, text2diagram is completely free to use with no signup required. You can generate unlimited diagrams and export them in multiple formats at no cost.
Is text2diagram free to use?
Yes, text2diagram is listed as free and does not require signup. The site text also describes a limited free mode, so usage may have limits even though the base tool is accessible without creating an account.
Is text2mermaid completely free?
Yes, it is free to use with no sign-up required. You can export diagrams without watermarks.
What diagram types can I create?
You can create flowcharts, sequence diagrams, ERDs, state diagrams, class diagrams, mindmaps, and Gantt charts. The AI auto-detects the type or you can specify it explicitly.
What diagram types does the AI diagram generator support?
It supports flowcharts, sequence diagrams, ERDs, mindmaps, state diagrams, class diagrams, and Gantt charts. The AI auto-detects the type or you can manually select one.
What export formats are available?
You can export diagrams as SVG (lossless vector), PNG (for documents), Markdown (for embedding), and OPML (for mind map tools like XMind or Obsidian).
What diagram types does text2diagram support?
text2diagram supports seven diagram types: flowcharts, sequence diagrams, ERDs (entity-relationship diagrams), class diagrams, state diagrams, mindmaps, and Gantt charts. The AI auto-detects or asks which type fits your prompt.
What kinds of diagrams can this AI diagram generator make?
It can generate flowcharts, sequence diagrams, ERDs, class diagrams, state diagrams, mindmaps, and Gantt charts. The site also shows example prompts for login flows, API handshakes, blog schemas, and project plans.
How do I export my diagrams?
You can export your diagrams as SVG or PNG files directly from the editor.
How do I export diagrams?
You can export diagrams as SVG, PNG, Markdown, or OPML files. The export options are available directly from the editor after generation.
Can I edit the generated diagram?
Yes, you can edit the Mermaid source code directly in the split editor. Every change instantly re-renders the diagram, allowing for precise customizations.
How does the AI determine the diagram type from my text?
The AI auto-detects the diagram type by analyzing your prompt in about 300 milliseconds, classifying it into flowchart, sequence, ERD, class, state, mindmap, or Gantt. You can also manually select the type if needed.
Do I need to know Mermaid syntax to create diagrams?
No, text2diagram generates valid Mermaid or Markmap source automatically from plain English or Chinese descriptions. You never need to write or understand the underlying syntax, though you can edit it if desired.
Do I need to know Mermaid or PlantUML first?
No, you can start with plain English or chat prompts. The app generates Mermaid or markmap source for you, and you can edit that output later if you want finer control.
Do I need to know Mermaid syntax to use this tool?
No, you just describe what you want in plain English, and the AI writes the Mermaid code for you.
Can I use the diagrams commercially?
Yes, you have full rights to use any diagram you create in commercial projects, presentations, or documentation.
Can I edit the generated diagram code?
Yes, the split-view editor lets you tweak the Mermaid or markmap source directly. Every edit triggers an instant re-render of the diagram.
Can I export diagrams to use in other tools?
Yes, you can export diagrams as SVG for lossless scaling, PNG for presentations, Markdown for embedding, or OPML for mind mapping apps like XMind and Obsidian.
Can I export the diagrams into other tools?
Yes, you can export SVG, PNG, Markdown, and OPML for mindmaps. That makes it easier to move the output into docs, slides, or mind-mapping apps like XMind or Obsidian.
Can I edit the Mermaid code after it's generated?
Yes, the diagram is displayed in an editor where you can modify the Mermaid syntax if needed.
Do I need an account?
No, no account is required. You can start generating diagrams instantly without any login or personal information.
Do I need to know Mermaid syntax?
No knowledge of Mermaid, PlantUML, or Graphviz is required. The AI interprets plain English descriptions and generates the code for you, though you can tweak it if you wish.
Who is text2diagram for?
It's designed for engineers, project managers, technical writers, students, and anyone who needs to communicate complex ideas visually without learning complex diagramming syntax.
How does the Chat mode differ from Quick mode?
In Chat mode, the AI asks 2–3 clarifying questions before generating a diagram, which is ideal for complex scenarios. Quick mode auto-detects the diagram type from your prompt in roughly 300ms for instant results.
Who gets the most value from text2diagram?
Engineers, product managers, technical writers, and students get the most value from it. It is especially useful when you need a diagram draft fast and do not want to build the layout manually.