About Flowchart Generator

Generate flowcharts from text descriptions with decision nodes, processes, and flows. Part of the DevTools Surf developer suite. Browse more tools in the Diagrams & Workflows collection.

Use Cases

• Document business processes for onboarding and standard operating procedures
• Visualize algorithm logic before implementation
• Create decision trees for customer support workflows
• Map approval workflows for process improvement analysis

Tips

• Write natural language descriptions of the process steps — the generator converts imperative statements ("Check if user is logged in") into proper flowchart nodes with decision diamonds
• Use the 'swimlane' mode to assign each step to a role or system — this transforms a process diagram into a cross-functional process map
• Export as SVG for embedding in documentation, or as Mermaid text to keep the diagram source in version control

Fun Facts

• Flowcharts were standardized by IBM in the early 1950s as a method for planning computer programs. Herman Goldstine and John von Neumann are credited with developing the first programming flowcharts in 1947 as a way to plan calculations on the ENIAC computer.
• ANSI/ISO 5807 (1985) is the formal standard for flowchart symbols. Despite the standard's age, most flowchart tools and users continue to use slightly different symbol sets — the standard has never been fully adopted universally.
• Mermaid.js, which generates diagrams from text using a Markdown-like syntax, was created in 2014 and gained massive adoption when GitHub added native rendering in 2022. As of 2023, GitHub renders over 1 million Mermaid diagrams per week in repository files and wikis.

FAQ

What is the difference between a flowchart and a swimlane diagram?

A flowchart shows the sequence of steps in a process. A swimlane diagram (also called a cross-functional process map) adds horizontal or vertical lanes that assign each step to a specific role, department, or system. Swimlane diagrams make handoff points and responsibilities visible.

What flowchart symbols are standard?

Rectangle/box: process step. Diamond: decision (yes/no). Oval/rounded rectangle: start/end (terminal). Parallelogram: input/output. Cylinder: database. Arrow: flow direction. These are from the ANSI/ISO 5807 standard — most flowchart tools use this set.

Can flowcharts replace code documentation?

Flowcharts complement but don't replace code comments and docstrings. They are excellent for documenting the high-level logic of complex algorithms or business rules but become unwieldy for detailed code flow. Use them for conceptual explanation; use code comments for implementation detail.