Sequence Diagram Generator
AI UML sequence diagrams. Describe your diagram in plain English below — free, no account needed. Output stays editable as draw.io XML and can be exported as SVG or PNG after signup.
Export anywhere
Copy the draw.io XML and import it into diagrams.net, draw.io desktop, or Confluence.
Edit visually
Click "Save & Edit Diagram" to open the result in AIDrawIO — drag, restyle, and re-prompt with better models.
Upgrade for more
Free tier: Gemini Flash, 5/hour. Sign up for GPT-5, Claude, unlimited, SVG/PNG export.
When to use this tool
Use it when message order matters, such as auth flows, API chains, webhook processing, or distributed system interactions.
Use it for engineering docs that must show both happy paths and failure or retry branches.
Use it when a flowchart is too generic and you need actors, requests, and responses laid out over time.
Example prompts
Prompt 1
OAuth 2.0 authorization code flow between client, user agent, authorization server, and resource server.
Prompt 2
OAuth PKCE login with browser, frontend app, authorization server, token exchange, API access, refresh rotation, and expired refresh path.
Prompt 3
Payment flow with customer app, backend API, payment processor, fraud service, webhook receiver, and refund branch.
Prompt 4
Internal request chain across API gateway, auth service, order service, inventory service, payment service, and notification service.
Prompt tips that improve results
Name the main actors, services, systems, or tables instead of describing the diagram vaguely.
Include boundaries, traffic direction, failure paths, or data stores when those details matter to the audience.
After generation, use a follow-up prompt to add labels, security controls, or a second level of detail instead of overloading the first prompt.
Good fit for technical docs
AIDrawIO is built around engineer-first diagram workflows. Generate the first version fast, keep the XML editable, and link the output into docs, reviews, runbooks, or design discussions.
Use category pages for broader discovery
If you are still deciding between diagram types, browse the broader AI diagram generator, technical diagram generator, and draw.io AI generator pages linked below.
Related resources
Go deeper with nearby tool pages, prompt libraries, examples, and guides for this diagram workflow.
Related tools
Switch to adjacent generators when you need a different level of detail or diagram style.
UML Diagram Generator
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Flowchart Generator
Turn processes into clean flowcharts with decision branches, loops, and actions.
System Architecture Diagram Generator
Generate end-to-end system architecture diagrams — clients, gateways, services, data stores, and integrations.
Prompt libraries and examples
Copy proven prompts and browse concrete diagram patterns close to this workflow.
Sequence Diagram Prompts
Sequence diagrams are easiest to generate when the prompt names actors, the order of requests, and any alternate or failure paths. These prompts give you a clean base for auth flows, API interactions, and service-to-service messaging.
OAuth2 Login Flow
Sequence diagram with token exchange, MFA, refresh rotation, and error states
Marketplace Payment Flow
Buyer → fraud detection → Stripe → fund splitting → seller payout with T+1 settlement
OAuth Sequence Diagram Pattern
A user authentication flow where a client application redirects to an authorization server, exchanges an authorization code for tokens, then accesses a resource API with token validation and refresh handling.
Guides and category pages
Learn the notation, best practices, and nearby commercial-intent pages around this diagram type.
系统设计图：该画什么，怎么画
系统设计图将架构思路变成可沟通、可评审、可落地的工程资产。
Mermaid 与 PlantUML：如何选择
Mermaid 与 PlantUML 是最主流的 Diagram-as-Code 方案，适用场景与学习成本各不相同。
AI Technical Diagram Generator
AIDrawIO focuses on technical diagrams engineers actually need: architecture diagrams, UML, ERDs, sequence diagrams, infrastructure maps, and cloud designs. Prompt first, then keep refining the result as an editable diagram.
AI Diagram Generator
AIDrawIO turns plain-English prompts into technical diagrams you can keep editing. Describe the system, process, or workflow you want, then export draw.io XML or share the result as SVG or PNG.
Mermaid vs PlantUML vs draw.io
Choose Mermaid for lightweight diagrams in docs, PlantUML for broader diagram-as-code depth, and draw.io for visual editing. Use AIDrawIO when you want AI to generate the first draft before continuing in Mermaid, PlantUML, or draw.io-oriented workflows.
Want this for your team?
AIDrawIO Pro gives your whole team unlimited diagram generation, shared workspaces, version history, and access to GPT-5 and Claude.
See pricingOther diagram generators
Frequently asked questions
Should I include alternate paths in a sequence diagram prompt?
Yes. Calling out timeout, retry, or error branches usually makes the generated sequence diagram much more valuable for engineering review.
Is this only for UML sequence diagrams?
It is strongest for UML-style sequence diagrams, but it also works for practical API, auth, and payment interaction flows that engineers need to document.
Is this tool really free?
Yes. You get 5 free generations per hour with no account required. Sign up for unlimited access with GPT-5, Claude, and Gemini Pro.
What diagram formats can I export?
The generated diagram is draw.io XML. Copy it and import it into draw.io or diagrams.net. Sign up to also export as SVG or PNG directly.
Which AI models are used?
The free tier uses Gemini Flash. Subscribers get access to GPT-5, Claude Sonnet, Gemini Pro, and more — with better layout quality.
Can I edit the generated diagram?
Copy the XML and open it in draw.io, or click "Save & Edit Diagram" to open it in AIDrawIO where you can visually edit, restyle, and re-prompt.
How do I get started?
Describe your diagram in the box above, then click Generate (or press ⌘↵). The placeholder text shows you the kind of detail that works best.
Will my prompts be used to train AI?
No. Prompts are sent directly to the AI provider and are not stored or used to train models by AIDrawIO.