JavaScript Code Analyzer

Analyze JavaScript source code and inspect useful code statistics, patterns, complexity indicators, functions, variables, comments and more.

Your code is analyzed locally in your browser. It is not uploaded to a server by this tool.

About This JavaScript Code Analyzer

The JavaScript Code Analyzer is a free browser-based developer tool for inspecting JavaScript source code. It provides useful statistics such as line counts, functions, variables, strings, numeric literals, operators and comments.

How To Use

  1. Copy your JavaScript source code.
  2. Paste the code into the analyzer.
  3. Click Analyze Code.
  4. Review the generated code statistics and detected patterns.

Features

  • JavaScript source code statistics.
  • Total line and code line counting.
  • Comment detection.
  • Function pattern detection.
  • Variable declaration detection.
  • String and numeric literal statistics.
  • Operator counting.
  • Common JavaScript pattern detection.
  • Runs directly in your browser.
  • No signup required.

Frequently Asked Questions

Is this JavaScript Code Analyzer free?

Yes. The analyzer is free to use.

Is my JavaScript code uploaded to a server?

The analysis performed by this tool runs locally in your browser. The tool does not intentionally upload the JavaScript source code to a server.

Does this tool execute my JavaScript code?

No. The analyzer treats the JavaScript as source text and performs static pattern analysis rather than executing the submitted code.

Can this tool detect every JavaScript issue?

No. This is a lightweight browser-based source analyzer rather than a complete JavaScript parser, compiler or linter. Its results should be treated as useful code statistics and pattern indicators.

Can I analyze large JavaScript files?

Yes. The analyzer is designed to handle normal JavaScript source files directly in the browser. Very large files may take additional processing time depending on the device.