Swimlanes.io is a free webapp for making sequence diagrams. You simply edit the text on the left and the diagram is updated in real time. You can download your sequence diagrams as images or distribute with a link.
Title: Welcome to swimlanes.io One -> Two: Message Note: **swimlanes.io** is a simple online tool for creating _sequence diagrams_. Edit the text to the left to update the diagram. **Copy the url** to save or share the diagram, _note that the url changes whenever you update the diagram_. Or `Sign in` to create an account and collect all of your diagrams. Two -> Two: To self Two -->> Three: _Notification_ Two -> One: `ok` Note: See **[full syntax overview](/gallery/full-syntax)** for more details