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About JavaScript Analyzer
JavaScript Analyzer is a browser-based tool for examining JavaScript source code and displaying useful statistics about its structure and content. It can help developers quickly understand the size and composition of a JavaScript file.
What Does This Tool Analyze?
- Total lines and code lines.
- Comment lines.
- Character count.
- Function and arrow function usage.
- Variable declarations.
- String and numeric literals.
- Classes, imports and exports.
- Async, await and Promise patterns.
- Loops and try/catch structures.
- Several common code-quality patterns.
How To Use
- Paste your JavaScript code into the editor.
- Click Analyze Code.
- Review the generated statistics.
- Check the detailed structure and quality information.
Privacy
Your JavaScript code is analyzed directly in your browser. The tool does not require an account or server-side upload for analysis.
Frequently Asked Questions
Is the JavaScript Analyzer free?
Yes. The tool is free to use and does not require registration.
Is my JavaScript uploaded to a server?
No. The analysis is performed by JavaScript running in your browser.
Can it execute my JavaScript code?
No. The analyzer treats the input as source code and does not execute the code you provide.
Can it detect every JavaScript error?
No. This tool provides source-code metrics and common pattern checks. It is not a replacement for a full JavaScript parser, compiler or linter.
Does the analyzer support modern JavaScript?
The analyzer recognizes many common modern JavaScript patterns including arrow functions, classes, async functions, imports and exports.