plai.chat
plai.chat
Describe the diagram you want in plain English. PLAI.chat's AI produces Mermaid source and renders it inline as a clean SVG — no copy-paste into a separate editor. One-click export for your docs, slides, and READMEs.
Try It Free →No signup for free models. 300+ AI models available.
Draw a Mermaid flowchart of a checkout flow:
browse → cart → sign-in (or continue as guest) → address → payment → review → confirmation.
Include an error branch for failed payment.Draw a Mermaid sequence diagram for OAuth 2.0 authorization code flow with PKCE.
Actors: User, Client App, Authorization Server, Resource Server.Generate a Mermaid ER diagram for a blogging platform:
users, posts, comments, tags, post_tags, with relationships.Draw a Mermaid Gantt chart for a 3-month product launch:
research (2 weeks), design (3 weeks), build (6 weeks), QA (2 weeks), launch week.Draw a Mermaid state diagram for an order:
created → paid → shipped → delivered, with cancelled + refunded transitions.PLAI.chat also recovers common AI formatting mistakes like concatenated mermaidflowchart or flowchartLR fences — so your diagrams render even when the model's output isn't perfectly formatted.
| Model | Strength | Best For |
|---|---|---|
| Claude Opus 4.6 | Deep reasoning, clean syntax | Complex flows, large sequence diagrams, ER diagrams from code |
| GPT-5.2 | Broad capability | Mixed tasks, rapid iteration, Gantt charts |
| Gemini 3 Pro | Long context | Big codebases — paste code, ask for a diagram |
| Grok / DeepSeek | Fast + cheap | Quick sketches and small flowcharts |
| Free tier models | Good enough for most | Everyday flowcharts and sequence diagrams |
Switch between models mid-conversation — ask a free model first, escalate to Claude Opus if the output needs fixing.
| App | Renders Mermaid Inline? | SVG Export? |
|---|---|---|
| PLAI.chat | ✓ Inline, automatic | ✓ One-click |
| ChatGPT | ⚠ Only in Canvas / specific modes | ⚠ Limited |
| Claude.ai | ⚠ Via Artifacts only | ✗ Manual |
| Gemini | ✗ Plain text code block | ✗ |
| Poe | ✗ | ✗ |
| ChatHub | ✗ | ✗ |
| TypingMind | ⚠ Via plugin | ⚠ Plugin-dependent |
Most AI chats return Mermaid as plain text inside a code block — you have to copy the code into a separate tool (like mermaid.live) to see the diagram. PLAI.chat renders Mermaid inline automatically, so the diagram appears as soon as the AI finishes responding.
Turn a function or module into a sequence or class diagram in seconds. Paste code, ask for the diagram, export SVG to README.
Draft user flows, process maps, and timelines without leaving chat. Iterate in plain English.
Generate diagrams for docs. SVG export drops into Docusaurus, GitBook, Notion, and Confluence.
Explain concepts visually. Ask AI to draw it, refine it, use it in slides.
Sketch system architectures, dependency graphs, deployment flows on the fly.
ER diagrams from schema descriptions. Gantt charts from project specs. Pie charts from numbers.
Open PLAI.chat, describe the diagram in plain English, and the AI produces Mermaid source that PLAI.chat renders inline. Click to export SVG.
ChatGPT produces Mermaid source but typically shows it as plain text in a code block. You have to copy it into a separate Mermaid editor. PLAI.chat renders inline automatically.
Yes. One-click SVG export on every rendered Mermaid block.
Flowcharts, sequence diagrams, class/ER/state diagrams, Gantt, pie, journey, gitGraph — all standard Mermaid types. Common malformed fences (mermaidflowchart, flowchartLR) are recovered.
Yes — Mermaid generation works on PLAI.chat's free tier with no signup. For complex diagrams, premium models (Claude Opus 4.6, GPT-5.2) give cleaner output at a few cents per diagram.
Yes. Paste code, ask for "Mermaid sequence diagram of function calls" or "flowchart of this logic". Works especially well with Claude Opus 4.6 and GPT-5.2.
No signup. No copy-paste. Just describe and render.
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