All ToolsCreate sequence diagrams showing interactions between actors and systems. Type simple text, get a professional diagram. Export PNG or SVG.
Create sequence diagrams online from simple text — no Lucidchart, no signup. Define actors and messages with arrow syntax, add loops and conditions, and get a clean UML sequence diagram. Export as PNG or SVG. Everything runs in your browser.
Type actor names and messages using arrow syntax: Alice->>Bob: Hello. The diagram renders instantly showing the interaction flow between participants with labeled arrows.
Yes. Use loop, alt, opt, and par blocks to show loops, alternatives, optional flows, and parallel execution. These render as labeled boxes around the relevant messages.
Export as PNG (raster image) or SVG (scalable vector). SVG is ideal for documentation — it stays crisp at any zoom level.