JavaScript Formatter
Format and indent JavaScript code into a clean, readable structure directly in your browser.
This tool runs entirely in your browser. Your files are never uploaded to a server.
function greet(name) {
const text='Hello '+name;
return text;
}What this formatter does
Adds line breaks after opening braces, closing braces, and semicolons, using two spaces per brace level. Ordinary quoted strings, template literals, escapes, and recognized line or block comments are kept while other whitespace is reduced.
How to use it
Paste JavaScript and inspect the result that updates immediately. Copy the output or use Reset to clear the editor; Reset does not restore the sample.
Important limitations
This is a character-based brace formatter, not a JavaScript parser, validator, linter, transpiler, or standards-aware printer. It does not understand regular-expression literals, automatic semicolon insertion, modules, JSX, or syntax trees, and it does not report unmatched braces or invalid code. Regex quantifier braces and line-sensitive statements can therefore be changed incorrectly.
Safe workflow and privacy
Keep the original and run your normal formatter, tests, and linter before production use. Formatting happens locally in your browser and pasted code is not uploaded.
Frequently Asked Questions
- What does the JavaScript Formatter do?
- Format and indent JavaScript code into a clean, readable structure directly in your browser.
- Does this JavaScript tool change program behavior?
- It only changes layout or removable whitespace. Review minified output before production use when code relies on unusual syntax.
- Is my code uploaded?
- Processing is local and your code is never uploaded.