AI Flowchart Generation Guide
No more dragging boxes and arrows by hand: let AI generate a Mermaid flowchart from one sentence, or edit by drag and drop online, and export Markdown and images with one click.
Why AI + Mermaid for flowcharts
Traditional tools (Visio, ProcessOn) make you drag nodes one by one, connect arrows and align everything — and any change means rework. Mermaid instead describes diagrams in text:
- Change one line of text and the diagram re-layouts automatically — no manual aligning;
- Plain text fits Git, code review and automation — developer-friendly;
- GitHub, Typora, Yuque, Notion and more support it natively — paste and it renders.
Add AI on top: you describe the process, AI writes the correct Mermaid code — flowcharting goes from ten minutes to one.
Option 1: have an LLM generate Mermaid directly
Send the prompt below to any LLM (ChatGPT, Claude, Qwen, DeepSeek, etc.), replacing "order to shipment" with your business:
Use Mermaid flowchart syntax to draw an "order to shipment" flowchart:
- Start → Place order → Check if stock is sufficient
- In stock: Create order → Pack & ship → End
- Out of stock: Show out-of-stock notice → Back to Place order
Requirements: decision as a diamond, start/end as stadium shapes,
output complete runnable Mermaid code only, no explanation.The model returns Mermaid code like this:
flowchart TD
A([Start]) --> B[Place order]
B --> C{Stock sufficient?}
C -->|Yes| D[Create order]
D --> E[Pack & ship]
E --> F([End])
C -->|No| G[Show out-of-stock]
G --> BOption 2: AI generation in the online editor
If you'd rather not set up a model and want to tweak by dragging after generation, use this site's Flowchart Editor — click "AI generate" in the toolbar and describe your flow in one sentence.
- After generation, drag nodes, edit text, change shapes and connect directly;
- The code panel and canvas sync in real time — copy Markdown code blocks or Mermaid source;
- One-click export to PNG / SVG / .md / .mmd files.
Adjusting and exporting after generation
AI occasionally misses a branch or picks a wrong shape — build a three-step checking habit:
- Walk the main flow against your business to confirm branches are complete;
- Confirm decisions use diamonds and start/end use stadiums (key for readability);
- Click "Tidy up" in the editor to re-layout, then export the format you need.
FAQ
Can AI-generated flowcharts be pasted into documents?
Yes. AI output is Mermaid text — paste it into any Mermaid-compatible platform (GitHub, Typora, Yuque, Notion, etc.) and it renders automatically; you can also paste it into this site's flowchart editor to keep adjusting by drag and drop before exporting.
Why use Mermaid instead of Visio / ProcessOn?
Mermaid is plain text, which naturally suits developers: it fits Git version control, code review and automation, and you edit text rather than redraw diagrams. The downside is that complex layouts are less free-form than drag tools. Combine both: this site's editor offers a drag canvas with two-way Mermaid code sync.
Can AI-generated flowcharts be wrong?
Occasionally — typically a missing branch or a misused node shape. Preview after generation, check the logic on the canvas, then fine-tune by hand. The editor's undo and tidy-up features make this quick.
Does it cost money or require sign-up?
Basic editing and export are completely free with no login, and data stays in your browser. AI generation requires your own model key (BYOK) for a direct connection, or the site's managed fallback quota.