Describe a flow, schema, mindmap, or API in plain language — or chat with AI to refine it. Draws instantly. Edit, export as SVG / PNG / Markdown, drop into any doc.
Write what you want in one or two sentences — a login flow with 2FA, a database schema for a blog, a product launch mindmap. Or switch to Chat mode and let AI ask a few clarifying questions first. English works. Chinese works. You do not need to know Mermaid, PlantUML, or Graphviz syntax.
In Quick mode, auto-detect classifies your prompt into flowchart, sequence diagram, ERD, class diagram, state diagram, mindmap, or Gantt in about 300ms. In Chat mode, AI asks 2-3 questions to firm up actors, events, and edge cases before picking a type — better for complex flows.
The AI returns valid Mermaid or markmap source, the preview canvas renders it live. In Chat mode, if AI made an assumption you disagree with, reject it in one click and the diagram redraws without that element. Zoom, pan, and reset view work on desktop and mobile.
Open the split view to tweak the generated Mermaid source directly. Every edit re-renders instantly. Export as SVG for lossless scaling, PNG for slides and docs, Markdown or OPML for mindmaps you want to import into XMind or Obsidian.
The AI diagram generator covers the seven diagram types most engineers, PMs, and technical writers reach for every week. Pick Quick mode for one-shot generation, or Chat mode when you want AI to ask questions before drawing. Each use case links to a focused landing page with its own examples and prompts.
Turn a written process — user signup, order fulfilment, deploy pipeline, incident response — into a top-down or left-to-right flowchart. Nodes, decision diamonds, and edge labels are inferred from the wording. Best for onboarding docs, runbooks, and RFCs.
Describe who calls whom — client, gateway, auth service, database, third-party API — and get a lifeline diagram with request and response arrows. The AI adds notes for async callbacks and error paths when the prompt implies them. Great for API design reviews and integration handoffs.
Sketch a data model in natural language — users write posts, posts have many comments, comments belong to users — and get an entity-relationship diagram with primary keys, foreign keys, and cardinality. Fastest way to align on a schema before writing a migration.
Feed the generator a topic — Renaissance art movements, product-market fit signals, launch checklist — and get an interactive markmap you can fold, expand, and export as OPML for XMind. Not just for engineering: writers, students, and PMs use it for outlines.
Model a state machine — order status, subscription lifecycle, deployment stages — with transitions labeled by triggering event. Cleaner than trying to describe state in prose, and catches missing transitions before you code them.
Turn a domain description into a UML class diagram with attributes, methods, inheritance, and associations. Useful for code review, refactoring proposals, and teaching object-oriented design without hand-drawing boxes.
Describe milestones and dependencies — design done by week 2, backend by week 5, launch week 8 — and get a Gantt chart with tasks, durations, and critical path. Lighter than Jira for anything that fits in a single sprint plan.
Common questions about the AI diagram generator. If you do not see your question here, everything else about the tool is exactly what you would expect — a text box, a preview, an export button, and no signup wall.