Flowchart Maker

Mapping out a process before implementing it is one of the highest-leverage activities in software development, business operations, and education. A flowchart forces you to identify every decision point, every branch, and every terminal state before a single line of code is written or a single workflow is deployed. The problem with most flowchart tools is that they are either too simple (basic boxes and lines with no structure) or too complex (full diagramming suites with a thirty-minute learning curve and a subscription fee). This tool lands in the middle: enough node types and connection mechanics to express real processes, simple enough to use without a tutorial.

The maker provides four node shapes following standard flowchart conventions: pill-shaped nodes for start and end points, rectangles for process steps, diamonds for decision branches, and rounded rectangles for input and output operations. You add nodes from a toolbar, drag them into position on a grid, and then click Link From on a source node followed by clicking the target to draw a curved arrow between them. Decision branches can be labeled Yes or No, and the entire diagram exports as structured JSON so you can save, version, or programmatically manipulate your flowcharts.

| Shape | Flowchart meaning | Typical label |

| --- | --- |

| Pill | Start / End | Start, End, Exit |

| Rectangle | Process step | Calculate total, Send email |

| Diamond | Decision | Is valid?, Approved? |

| Rounded rect | Input / Output | User input, Display result |

Select a node type from the toolbar: process, decision, start/end, or I/O.

Drag the node to your desired position on the grid canvas.

Click Link From on the source node, then click the target node to create a curved arrow connection.

Double-click any node to edit its label text.

Click Export to download the entire diagram as a structured JSON file.

After building your flowchart, trace every path from the start node to each end node to verify there are no dead ends or unreachable states. Check that every diamond decision node has at least two outgoing connections (typically Yes and No). Verify that the JSON export contains all your nodes and edges by opening it in a text editor — the structure should list every node with its position and label, plus every edge with its source and target references. If you reload the page, the diagram resets because the tool does not persist state to local storage in the current version, so export your JSON before navigating away.

Creating diamond decision nodes without connecting both the Yes and No branches, leaving an incomplete path.

Overcrowding the canvas with too many nodes before organizing the layout — start with a rough sketch and refine positions after all nodes exist.

Forgetting to export the JSON before refreshing or navigating away, since the diagram is not auto-saved.

Per-edge deletion is not supported in the current version — deleting a source or target node removes all connected edges automatically, but you cannot remove a single edge while keeping both nodes. The tool does not support loops (an edge from a node back to itself) or cross-page connectors for very large diagrams. Touch devices can drag nodes via the toolbar but may have less precision than mouse-based positioning. The JSON export is human-readable but there is no import function yet, so you cannot reload a previously exported diagram into the editor.

A product manager mapping a user onboarding flow with decision branches for different signup methods.

A developer diagramming an error-handling pipeline before implementing try-catch logic in code.

A teacher creating a decision-tree flowchart for a science lab procedure that students can follow step by step.

Q: What node shapes are available?

A: Pill (start/end), rectangle (process), diamond (decision) and rounded (I/O) — each follows standard flowchart conventions.

Q: How do I delete an edge?

A: Delete the source or target node and the edge disappears automatically. Per-edge deletion is not supported in this version.

Q: Can I label edges?

A: Yes — decision branches often need Yes/No labels. The tool auto-shows them when present in the data model.

Q: Is it touch-friendly?

A: Drag works on touch devices; node creation uses the toolbar buttons.

Q: Can I save my diagram?

A: Export as JSON to save your work. There is no auto-save or import function in the current version, so keep your JSON file.

Build process diagrams and decision trees with the Flowchart Maker. For other visual thinking tools, try the Mind Map Maker or the Org Chart Maker. Plan project timelines with the Gantt Chart Maker or analyze strategy with SWOT Analysis.