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Code Flow Analysis

Paste your code below to automatically generate a flowchart that visualizes the logical flow and structure of your code.

Code Input

Supports multiple programming languages. The analyzer will automatically detect patterns and generate a flowchart.

Modern flowcharts with interactive elements. Compatible with GitHub, GitLab, and many documentation tools.

Ready to Analyze

Paste your code above and click "Generate Diagram" to see the flow visualization.

The Ultimate Code Flow Analyzer and Diagram Generator

Understanding complex codebases or undocumented legacy scripts can be overwhelming. Rather than manually tracing function calls and nested conditional logic, our free online Code Flow analyzer instantly converts your raw code into intuitive, visual flowcharts. Whether you are a business analyst documenting technical workflows or a developer debugging spaghetti code, this tool automates the heavy lifting of code comprehension.

Automatic Complexity Analysis

When you paste your script, our engine immediately scans the syntax to detect the programming language—supporting JavaScript, Python, Java, C#, PHP, and more. It then performs a static complexity analysis, tallying up total functions, conditional branches (if/else/switch), and loops. This provides an immediate metric for cyclomatic complexity, helping you determine if a particular block of code needs refactoring before you even begin reading it.

Multiple Diagram Formats

Every team has their preferred documentation standards, which is why our tool supports exporting your code flow into four distinct diagramming languages:

  • Mermaid (Interactive): The modern standard for markdown documentation. Native support in GitHub and GitLab makes this perfect for README files.
  • PlantUML: A staple in enterprise software architecture, ideal for generating strict UML activity diagrams.
  • Graphviz DOT: Perfect for directed graphs and advanced network topology visualization.
  • ASCII Text: For when you just need a quick, no-frills flowchart that you can paste directly into a plain text editor, terminal, or Slack message.

Visual and Code Views

Once analyzed, you can toggle between a fully rendered visual preview of your logic flow and the raw generated markup code. This allows you to immediately verify the accuracy of the diagram before copying the markup directly into your company wiki, Notion workspace, or Confluence page.

100% Client-Side Privacy

Proprietary source code is highly sensitive. We understand that you cannot simply paste your company's intellectual property into a random web tool. That is why our Code Flow analyzer operates entirely within your web browser. There are no backend servers parsing your code or storing your logic. The parsing, analysis, and diagram generation happen locally and instantly on your device.