🏊 Swimlane Diagram Maker
Map who does what: add lanes for each role, drop steps into them, wire the flow with arrows — then export a PNG, PDF or reusable JSON. Private, in your browser.
Each row is a lane (a person, team or system). Add steps, drag them between lanes and along the timeline (they snap to the grid), and use Connect to draw the process flow. Saved locally; export PNG/PDF/JSON. 🔒
How the swimlane diagram maker works
A swimlane diagram is a flowchart split into parallel lanes, where each lane is a person, team, department or system, so you can see not just what happens but who is responsible for each step. Add a lane for each actor, then add steps and drag them into the right lane and along the timeline — steps snap to a clean grid so the diagram stays aligned. Turn on Connect and click two steps to draw the arrow that shows the flow of work, including hand-offs that cross from one lane to another. Rename or delete lanes and steps as the process changes. Export the finished diagram as a PNG or PDF to share, or as JSON to reload and keep editing.
Swimlanes earn their keep on cross-functional processes — order fulfilment, onboarding, approvals, support tickets — where the interesting failures happen at the hand-offs between teams. The arrows that jump between lanes are exactly those hand-off points, so pay attention to how many there are: each one is a place work can stall or get dropped. For a process that all happens in one place, a plain flowchart or checklist is simpler. Everything stays on your device and is saved locally.
Frequently asked questions
What is a swimlane diagram?
A swimlane (or cross-functional) diagram is a process flowchart divided into lanes, where each lane represents a person, team, department or system. It shows both the sequence of steps and who is responsible for each one, making hand-offs between roles obvious.
How do I make a swimlane diagram here?
Add a lane for each role, then add steps and drag them into the correct lane and column — they snap to a grid. Turn on Connect and click two steps to draw an arrow between them. Edit text inline, and export as PNG, PDF or JSON.
When should I use a swimlane instead of a flowchart?
Use a swimlane when more than one person, team or system is involved and you care about who does what — it makes hand-offs between roles visible. For a process that stays within a single role, a plain flowchart is simpler.
Can steps hand off between lanes?
Yes — connect a step in one lane to a step in another and the arrow crosses lanes. Those cross-lane arrows are the hand-off points, often where a process is slowest or most error-prone, so they are worth reviewing.
Is my diagram private, and can I export it?
It is stored only in your browser and never uploaded. Export it as a PNG or PDF image to share or print, or as JSON to re-import later or move it between your own devices.