JavaScript Formatter
Apply simple indentation to JavaScript source.
This is a lightweight formatter, not a full JavaScript parser.
How to use this calculator
What to enter
Enter or select the following as requested: JavaScript. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The developer-tool output validates, formats, parses, converts, or compares the supplied text according to the selected syntax or encoding. Check the target language or data format, escaping rules, line endings, and whether formatting changes semantics or only presentation.
When to use it
Use this to inspect or prepare code and structured data during development. Review generated output and run appropriate tests before committing or deploying changes; a successful format or parse check does not prove the code is secure or correct.