How do I format code on this page?
Paste code into the left editor or load a file, choose the options you need, and select Format. Review the result on the right, then copy or save it.
JavaScript Formatter beautifies minified or uneven JavaScript with consistent indentation, spacing, line breaks, and brace placement. It supports modern syntax including classes, private fields, async functions, optional chaining, nullish coalescing, template literals, modules, and React JSX.
Choose tabs or spaces, set a preferred line width, control brace style, preserve useful newlines, keep existing array indentation, or split long method chains. Press Ctrl+Enter or Command+Enter to format directly from the editor.
Minify removes comments and unnecessary code while retaining readable identifiers. Minify & Mangle also shortens eligible local names for a smaller result. Minification expects executable JavaScript, so JSX should be compiled before it is minified. All processing runs locally in your browser.
Paste code into the left editor or load a file, choose the options you need, and select Format. Review the result on the right, then copy or save it.
The input must match the selected language or syntax. Check incomplete statements, unmatched brackets or quotes, and a dialect or mode that does not match the input, then format again.
A code formatter reads language-aware tokens and nested structures, then rewrites indentation, spacing, and line breaks according to a consistent rule set. It does not compile or run the program, so formatting is not a correctness or security check.
Two spaces is the most common web-project default. Keep existing line breaks unless the project enforces wrapping, enable JSX for JSX input, and follow the repository configuration for brace style and other choices. Formatting, minifying, and shortening variable names are separate actions.