AI · text or image → Mermaid
AI Mermaid Generator
Describe it, paste it, or drop in a screenshot — get clean Mermaid you can preview, edit, and export.
10 free credits after sign-in · no card · rendered locally in your browser
Describe any diagram, or tap a suggestion. It renders below to tweak and export.
Export controls activate after your diagram renders locally.
Why the code just works
LLM-written Mermaid has a reputation: syntax that fails the moment you paste it somewhere else. This workspace is built around fixing that.
Every AI result is parse-validated before you see it. Broken syntax is repaired automatically — free — using the exact parse error.
Flowcharts, sequence, class, ER, state, Gantt, mindmaps, timelines — the AI picks the right type, and you can ask for another.
The code is ordinary Mermaid: tweak it by hand or by chatting, switch themes, and export watermark-free PNG, SVG, JPG, WebP, or PDF.
How it works
Write what you want — a login flow, a database schema, a sprint plan — or attach a screenshot or hand-drawn sketch.
The model returns Mermaid, parse-checked and auto-repaired so it renders first try.
Edit the code or refine by chatting, pick a theme, and export a crisp image — no watermark.
Other AI tools
Describe a system — or paste docker-compose / Terraform / K8s / SQL — and get an explorable map, shareable as one HTML.
Open →Screenshot to Mermaid3 creditsDrop a screenshot or hand-drawn sketch and get the same editable Mermaid code.
The same tool as Text to Mermaid, opened on the image tab.
Open →Upgrade for more
Everyone gets 10 free credits after signing in. For more, subscribe to Pro for a monthly AI allowance plus unlimited premium theme exports, or buy a one-time credit pack.
- ✦ Unlimited premium theme exports — all 7 Advanced styles
- ✦ 200 AI credits every month (≈65 generations, or ≈40 interactive maps)
- ✦ One allowance across tools: text, screenshots, AI edits, syntax fixes
- ✦ Parse-checked output with free auto-repair when syntax breaks
- ✦ Cancel anytime
You get 20 credits for every friend who signs in; they get 5 bonus credits too.
FAQ
Questions about the AI Mermaid generator
How does the AI Mermaid generator work?+
Describe the diagram you want in text (any language), or attach an image of one, and the AI returns Mermaid code. The code drops straight into the editor below, where you preview it and export a PNG, SVG, JPG, WebP, or PDF — all rendered locally in your browser.
How is this different from asking ChatGPT for a Mermaid diagram?+
ChatGPT writes you code that may not render — invalid syntax is the most common failure. Here the code is parse-checked immediately and auto-repaired for free when it breaks, the result lands in a full editor with themes and version history, and the export pipeline produces watermark-free PNG/SVG/JPG/WebP/PDF. Editing and exporting the standard themes stay free.
Is the AI generator free?+
Sign in and you get 10 free credits. An AI generation or edit costs 3 credits, a syntax fix 1, and a premium theme export 2 — mix and match however you like. After that, subscribe to Pro for a monthly AI allowance plus unlimited premium theme exports, or buy a one-time credit pack. Editing and exporting the standard themes is always free with no watermark.
Which diagram types can the AI generate?+
Flowcharts, sequence diagrams, class diagrams, ER diagrams, state diagrams, Gantt charts, mindmaps, timelines, and more — the AI picks the most suitable Mermaid diagram type for your description.
Can I turn an image into Mermaid?+
Yes. Attach a screenshot, photo, or hand-drawn sketch in the same input box (click the attach icon, drag a file, or paste), and the AI reads it into editable Mermaid — no separate tool needed.
Can I edit the AI-generated diagram?+
Yes. The generated Mermaid code is fully editable in the editor below, and you can keep refining it by chatting in the same box. Adjust nodes, labels, and styling, then export the final image.
Who is this for?+
Engineers writing design docs or RFCs, developers who know Mermaid is the right format but not its syntax, anyone turning a screenshot into an editable diagram, and teams that keep their diagrams as reviewable code in docs and wikis.