Behavioral UML
Activity Diagram Maker
Map a workflow with actions, decisions, and end states. Start from the template, rename steps to match your process, and export when the path is clear.
Features
- Live editor for activity diagram maker
- Starter template included on the page
- PNG and SVG export
- No install required
Need a blank canvas? Open the full UML studio.
What you can model
Activity diagrams show procedures with decisions and merges: onboarding, fulfillment, moderation, support scripts, and product user paths that follow a clear procedure.
How to use this maker
Begin at start, add actions as verb phrases, branch with decisions, end at stop, preview, then export PNG or SVG for process docs.
Notation that matters
Actions are steps. Diamonds (or if syntax) mark decisions. Merges reunite paths. Start and stop mark the ends of the flow. For user paths, name actions after screens or user goals. Keep platform-specific branches on separate diagrams when mobile and web diverge.
Keep the diagram readable
Prefer a sequence diagram when message order between systems is the main question. Use the flowchart maker for a general process picture without UML framing, and the swimlane maker when ownership by role matters.
Frequently asked questions
Is this activity diagram maker free?
Yes. Edit and export in the browser without a subscription.
Activity diagram or flowchart?
Activity diagrams follow UML and connect to other UML views. Use the flowchart maker when you want a general process picture without UML framing.
Activity diagram or sequence diagram?
Use activity for workflow steps and decisions. Use sequence when participants exchanging messages over time is the story.
Related tools
- Flowchart MakerCreate a flowchart for processes, support scripts, and simple algorithms. Start from the template, k…
- Swimlane Diagram MakerSeparate process steps into lanes by role or system so ownership stays visible. Start from the templ…
- Use Case Diagram MakerShow who uses the system and which goals they pursue. Start from the template, keep use cases at goa…
- Sequence Diagram MakerDraw a sequence diagram for auth flows, service calls, and feature interactions. Start from the temp…
Browse the full UML diagram tools directory or return to the UML diagram hub.