MyMapDescribe the interaction
Name the systems, services, or actors and describe how they communicate. Include request/response pairs, conditions, or async calls if relevant.
Sequence Diagram Maker
Describe the actors and message flows in your system and AI builds a sequence diagram — lifelines, arrows, activation boxes, and labels, all in the right order.
✦Free to try · No signup required · PDF, docs & images supported
Simple by design
How it works
AI builds the diagram
MyMap generates a sequence diagram with vertical lifelines, horizontal arrows for messages, and activation boxes — all in correct sequential order.
Edit and document
Add new actors, change message labels, or ask AI to add error paths and retry loops. Export as PNG or PDF for technical docs.
About the framework
What is a Sequence Diagram?
A sequence diagram is a UML (Unified Modeling Language) diagram that shows how objects or systems interact over time, with a focus on the order of messages exchanged. Participants are arranged as vertical lifelines, and messages flow horizontally between them, top to bottom, in chronological sequence.
First standardized by the Object Management Group (OMG) in the 1990s as part of UML, sequence diagrams became essential for software architecture documentation, API design, and system integration planning.
Why sequence diagrams work
- Temporal ordering makes it unambiguous which messages happen before or after others
- Multi-actor clarity shows exactly which system or component sends and receives each message
- Activation boxes indicate how long a participant is actively processing
- Conditional and loop fragments model branching logic, retries, and async patterns
Sequence diagrams are indispensable when designing or documenting authentication flows, API contracts, microservice interactions, and event-driven architectures — anywhere the order of operations between components is critical.
MyMap's AI generates a properly structured sequence diagram from a plain-language description of your actors and message flows — no UML syntax needed.
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Frequently asked questions
Common questions
Is the sequence diagram maker free?
Yes — free to use without signing up. Free accounts include a generous number of AI messages per month. Upgrade to Pro for unlimited diagrams.
Does this support UML sequence diagram notation?
Yes. The generated diagrams follow UML sequence diagram conventions — lifelines, synchronous and asynchronous arrows, activation bars, and notes. You can also use plain language and AI will apply the correct notation.
What use cases are sequence diagrams good for?
API design, microservice architecture, authentication flows, database query patterns, event-driven systems, and any scenario where you need to show the order of messages between components.
Sequence Diagram Maker
Free to start. No credit card required.
✦Free to try · No signup required · PDF, docs & images supported