Code Complexity Analysis
Analyze code metrics including cyclomatic complexity, nesting depth, and lines of code.
Code Input
Complexity Grade Guide
AComplexity 1-5: Simple, easy to test and maintain
BComplexity 6-10: Moderate complexity, consider refactoring
CComplexity 11+: High complexity, strongly recommend refactoring
Usage Guide
This tool analyzes code complexity metrics to help developers identify functions that need refactoring, improving code maintainability.
Features
- Count total lines, code lines, comment lines, and blank lines
- Identify functions and calculate cyclomatic complexity, nesting depth, lines, and parameter count for each
- Assign A/B/C grades based on cyclomatic complexity (A: 1-5 simple, B: 6-10 moderate, C: 11+ complex)
- Support JavaScript/TypeScript and other C-like syntax code
Steps
- Paste the code to analyze in the input area
- Click "Sample" to load example code for a demo
- View the top stat cards for overall complexity
- View the function analysis table to locate the most complex functions
- Focus on functions graded B/C for priority refactoring
Notes
- Analysis is based on text matching; support for non-C-like syntax (e.g., Python) is limited
- !Nesting depth is calculated by curly braces
{, not applicable to indentation-based languages - Cyclomatic complexity counts decision keywords (if/else/for/while/case/catch/&&/||/?)
- All calculations are done locally in the browser; code is not uploaded to any server