Format JavaScript with consistent indentation and spacing. Make compressed code easier to review without running the source.
How to use
Paste JavaScript and generate the formatted output. Fix syntax errors before copying the result. Keep a source copy for comparison.
Example
const total=(a,b)=>{return a+b} becomes a consistently spaced function with a readable body.
FAQ
Does formatting prove the program works?
No. Parsing does not check runtime behavior, dependencies, or business logic. Run the project's own tests after editing.
Related tools
A practical task
Format a function before reviewing a small change so the logic is visible. Keep formatting changes separate from behavior edits in a code review when possible. A clear diff is easier to assess than a large block mixing renamed variables with new indentation.
Another useful question
Will this check package imports?
It parses the supplied source and formats it. It does not install dependencies, resolve your project configuration, or prove that imported modules exist.
Details for interpreting the result
| Detail | Explanation |
|---|---|
| Formatting and behavior | A formatter changes presentation of source code. It does not prove that a program calculates the right value or that a page looks correct. Keep behavior checks separate from indentation and spacing checks. |
| Readable and compact source | Minification produces a compact delivery copy. Keep the readable source for maintenance and rebuilding. Editing only a compressed copy makes reviews harder and loses the useful context removed with comments. |
| Comments in source files | Comments can contain licenses, build notes, and explanations as well as disposable text. Before removing them, check the obligations of bundled assets and keep important notices in the appropriate source or distribution file. |
| Regex engine | Regular expression syntax belongs to an engine. A pattern accepted by JavaScript can differ from a pattern in another language. Test the exact engine and flags used in the application that will run it. |
| Strict JSON syntax | JSON needs double quotes around keys and string values. Objects use braces and arrays use square brackets. Comments and trailing commas belong to other formats, so remove them before treating a source as JSON. |
| Syntax and schema | A document can be syntactically valid yet contain the wrong fields or types for an application. Syntax checks confirm the format; schema and business rules determine if the receiving system can use the data. |
| Source boundaries | A summary or rewrite works from the material you provide. A URL alone does not supply the full article in this interface. Include the relevant passage and keep citations attached to the claims they support. |