Live workspace
Edit on the left. Inspect and export on the right.
The preview updates after you pause typing.
Start with sequenceDiagram and keep each statement on its own line.
Scroll inside the canvas when the diagram is wider than the panel.
Everything you need for Mermaid sequence diagrams
Focused tools that keep the edit-preview-export cycle tight, so your team can document complex flows faster.
Paste or type sequenceDiagram syntax and see updates with every change.
Comfortable spacing for actors, messages, and notes keeps flows easy to scan.
Download PNG at 2x or 3x for crisp slides, or SVG for scalable docs.
Zoom in to inspect details during design reviews and walkthroughs.
Preview changes in real time without switching tools or tabs.
Generate assets that drop into Notion, Confluence, GitHub, or wikis.
Where sequence diagrams create clarity
Sequence diagrams capture who talks to whom, in what order, and why. Use them to align engineering, product, and support teams around time-ordered flows.
This Mermaid sequence diagram editor helps you turn complex interactions into a single, readable story. Keep the source in version control and export diagrams for specs, design reviews, and release notes.
Because Mermaid syntax is text-first, teams can iterate on diagram logic alongside code, making reviews and updates faster than maintaining a separate drawing tool.
- API request and response lifecycles
- Microservice choreography and handoffs
- Authentication, token exchange, and session flows
- Payment and checkout sequence mapping
- Error handling, retries, and fallback logic
- Customer support and onboarding runbooks
Mermaid sequence diagram FAQ
Quick answers to common questions before you export your diagram.
What is a sequence diagram?
A sequence diagram shows how systems and people exchange messages over time, making it easier to understand order, dependencies, and responsibilities.
Which Mermaid syntax does this tool support?
Paste Mermaid sequenceDiagram syntax into the editor and the preview updates automatically as you type.
Which export formats are available?
You can download SVG for scalable docs, or PNG at 2x and 3x for slides and images.
How should I use the exported assets?
SVG is ideal for documentation and wikis, while PNG works well for presentations, tickets, and design handoffs.