Describe it.
We diagram it.
Mermaid Studio turns plain language into clean, professional diagrams — flowcharts, sequences, ER models, Gantt charts and more. Powered by Mistral AI, hosted in France, with your data never leaving the EU.
No credit card. No install. Runs in your browser.
From idea to diagram in three steps
No syntax to learn. No drawing tools to fight with.
Describe
Type what you want in plain language — or paste a document and let the AI extract the diagrams hiding inside it.
Generate
Sovereign European AI writes clean Mermaid code and renders it live. Refine it with one-click “Improve” or edit the code directly.
Share
Export crisp PNG or SVG, copy to clipboard, or publish a beautiful public page with one click.
Everything a serious diagram tool should have
A professional editor underneath, an AI assistant on top.
AI generation & analysis
Generate diagrams from text, analyze whole documents into multiple diagrams, improve layout and get plain-language explanations of any diagram.
Professional code editor
CodeMirror-powered editing with syntax highlighting, multi-tab workspace, live preview, command palette and full keyboard shortcuts.
Pixel-perfect exports
PNG at 1×, 2× or 4× resolution for print, clean SVG for the web, or straight to your clipboard.
Cloud library & version history
Organize diagrams into collections with tags and favorites. Every change is versioned — restore any previous state in one click.
One-click publishing
Publish any diagram as a fast, SEO-friendly public page with a rich link preview — perfect for docs, wikis and social posts.
Truly European
Full interface in all 24 official EU languages. AI and hosting in France. Your diagrams never cross the Atlantic.
12 diagram types, one studio
Each with templates, AI generation and a complete guide.
Flowchart
Map any process, decision or algorithm
Read the guide →Sequence diagram
Show how systems and people talk to each other
Read the guide →Class diagram
Model your domain and object structure
Read the guide →Entity-relationship diagram
Design database schemas that make sense
Read the guide →State diagram
Capture every state and transition of a system
Read the guide →Gantt chart
Plan projects on a clear timeline
Read the guide →Pie chart
Show proportions at a glance
Read the guide →Mind map
Organize ideas around a central topic
Read the guide →Git graph
Explain branching strategies visually
Read the guide →Timeline
Tell a story year by year
Read the guide →User journey
See your product through your users’ eyes
Read the guide →Quadrant chart
Prioritize with a 2×2 matrix
Read the guide →Sovereign by design, not as an afterthought
Built for European teams that take data governance seriously.
🇪🇺 Your data stays in the EU
Diagrams, documents and prompts are processed and stored on servers in France. No transfer outside the European Union, ever.
✦ European AI — Mistral
Generation runs on Mistral models hosted in Europe via AI SmartTalk. Your content is never used to train models.
📋 Compliance you can show your DPO
GDPR-compliant processing, EU AI Act limited-risk classification, transparent AI usage. Documentation ready for your audits.
Frequently asked questions
Is Mermaid Studio free?
Yes. The editor, templates, exports and sharing are free. AI generation uses your AI SmartTalk account, which includes a free tier with monthly tokens.
What is Mermaid?
Mermaid is the leading open-source “diagram as code” language: you describe a diagram in short text syntax and it renders automatically. It is used in GitHub, GitLab, Notion and most modern documentation tools.
Where is my data processed and stored?
In France. AI runs on Mistral models hosted in Europe through AI SmartTalk, and your cloud library is stored on French infrastructure. Nothing leaves the EU.
Can I use my diagrams in GitHub, Notion or Confluence?
Yes. Export the Mermaid code and paste it anywhere Mermaid is supported, or export PNG/SVG for any other tool. Published diagrams also embed nicely with rich link previews.
Do I need to know the Mermaid syntax?
No. Describe what you want and the AI writes the code. The live editor makes it easy to learn the syntax over time — and our diagram guides cover every type.
Your next diagram is one sentence away
Join teams across Europe who document faster with sovereign AI.
Open Mermaid StudioFree to start • 24 EU languages • Data stays in Europe