Design clear interactions, fast.
Create professional sequence diagrams with AI. Define participants, messages, notes, and lifelines in minutes—then preview, refine, and export.
Focused features for sequence diagrams
Everything you need to map interactions precisely.
AI flow builder
Describe your process; the sequence diagram generator creates participants, messages, notes, and lifelines instantly.
Participant editor
Define actors with IDs, display names, and optional aliases. Choose Participant or Actor type.
Message controls
Pick from/to, message text, arrow type (sync, async, return), and toggle activation/deactivation.
Notes placement
Add notes left, right, or over one or two participants to clarify context.
Readable sequencing
Show sequence numbers, mirror actors at bottom, and adjust font size for clarity.
Zoom and export
Enable zoom/pan for reviews, then export PNG/SVG or embed the result.
Bring your data
Start from sample
Load the login flow preview and adapt participants, messages, and notes.
Type it in
Add participants, messages, and notes directly in the editor.
Paste your outline
Paste a step-by-step description; AI maps roles and interactions.
Upload a file (Pro)
Import structured data for faster setup and editing.
Share and export
Export images
Download crisp PNG or SVG for slides, docs, and wikis.
Share a link
Create a view-only link to your sequence diagram.
Embed anywhere
Copy an embed to add the diagram to your website or portal.
Collaborate
Share for quick reviews with consistent, numbered steps.
About the Sequence Diagram Generator
This tool builds sequence diagrams with AI. Define participants, messages, and notes fast. Toggle sequence numbers and mirroring for clarity. Preview updates as you edit. Export or embed in seconds.
- ✓AI-assisted setup from plain language
- ✓Precise arrow types and returns
- ✓Lifeline activation controls
- ✓Notes positioned left, right, or over
- ✓Zoom, numbering, and mirroring options
Quick facts
How it works
Go from idea to diagram in minutes.
Describe your flow
Tell the AI what happens, who’s involved, and any notes to include.
Login: User enters credentials; Frontend sends Login request to Backend; Backend checks Database; return Auth token; show Login success.
Review participants
Confirm IDs, display names, and actor types (Participant or Actor).
Participants: User, Frontend, Backend, Database.
Tune messages and notes
Adjust arrow types, activation bars, and note positions for clarity.
Use ->> for service calls; add note “Authentication process” over Frontend, Backend.
Finalize and export
Enable sequence numbers, mirror actors, set font size, and download or embed.
Show numbers, mirror actors, font 14; export SVG.
Use cases
Where sequence diagrams deliver clarity.
Design and document flows
Capture API calls, auth sequences, microservice interactions, and return values.
Incident and runbook sequences
Visualize escalation paths, alerts, handoffs, and remediation steps.
User interaction sequences
Explain multi-system journeys across apps, services, and third‑party APIs.
Teaching systems interactions
Demonstrate client–server patterns, protocols, and concurrency behaviors.
Why switch now
Contrast manual diagramming with AI assistance.
Manual diagramming pain
- ✗Drag-and-drop tedium for every step
- ✗Inconsistent notation across teams
- ✗Hard to update as flows evolve
- ✗Limited starting points or templates
- ✗Export and sharing friction
- ✗No automatic step numbering
AI-assisted clarity
- ✓Describe and generate in seconds
- ✓Consistent actors, arrows, notes, and lifelines
- ✓Edits ripple through the whole diagram
- ✓Starter templates for common flows
- ✓One-click export and embeds
- ✓Automatic sequence numbers and mirroring
FAQ
What is an AI sequence diagram generator?
It’s a tool that builds sequence diagrams from a short description. You describe participants and interactions; the system creates a complete diagram with messages, notes, and lifelines. You can edit anything with simple controls and export when ready.
How do I create a sequence diagram online for free?
Open the generator, start from the sample, or describe your flow. Edit participants, messages, and notes, then export PNG/SVG or share a link. Core features are free to use.
Can I control arrow types (sync, async, return)?
Yes. Choose from ->, -->, ->>, -->>, -x, --x, -), --) to represent synchronous, asynchronous, return, or failed messages. Pick per interaction and adjust activation as needed.
How do activation and deactivation work?
Use Activate Target and Deactivate Target on messages to show lifeline activity bars. This clarifies when a participant is processing a call or finished.
Can I add notes over multiple participants?
Yes. Place notes left of, right of, or over one or two participants to explain context, constraints, or decisions.
Inclusive by design
- ✓Keyboard-friendly editing and navigation
- ✓Readable fonts with adjustable sizes
- ✓High-contrast visuals and non‑color cues for states
- ✓Clear labels that aid screen readers
- ✓Zoom and pan for comfortable viewing
Privacy and control
- •Your diagrams stay private until you share them
- •We don’t sell your data
- •Download or delete your work anytime
- •Share links are revocable at any time
- •Uploads are handled only to build your chart
Make your sequence clear
Generate, refine, and export a clean sequence diagram in minutes.