JavaScript Code Formatter

JavaScript Code Formatter

Paste minified, messy, or compressed JavaScript and get back a clean, consistently formatted version you can actually read. The formatter is token-aware — it understands string literals, template literals, regular expressions, and comments, so it never accidentally reformats the inside of a regex or rearranges your ${...} interpolations. Everything runs in your browser, so the code you paste never leaves your machine.

Comment utiliser

1. Paste your JavaScript into the input box.
2. Pick your indentation, quote style, and semicolon policy.
3. Choose a brace style (1TBS or Allman) and a trailing-comma policy.
4. Set a target print width — long object literals and arrays are split to fit.
5. Copy the formatted output or download it as a .js fichier.

Caractéristiques

• Sortie déterministe – the same input always produces the same result.
• Indentation configurable – 2 spaces, 4 spaces, or tabs.
• Quote conversion – switch between single, double, or preserve the original style with safe escape handling.
• Semicolon policy – always insert, strip them all, or preserve what is already there.
• Brace styles – 1TBS (same line) or Allman (next line).
• Virgules finales – none, ES5 (objects and arrays only), or all (including function arguments).
• Print width wrapping – long literals are split across multiple indented lines.
• Modern syntax – arrow functions, async/await, spread/rest, destructuring, classes, template literals, BigInt, and regex literals are all recognised.
• Comment preservation – inline and block comments survive the format pass.
• Runs locally – your code never leaves the browser.

Quand utiliser cet outil

Reach for this formatter when you are reading minified bundles in the wild, inspecting a third-party snippet, copying code out of a chat or email into a real project, or normalising a teammate’s style before reviewing a pull request. Unlike a full linter, it focuses purely on whitespace and punctuation — your logic stays untouched.