JavaScript Formatter tool built for developers. Fast, reliable, and works entirely in your browser.
100% free, no signup required. Works entirely in your browser.
Open JavaScript FormatterEnter your unformatted JAVASCRIPT code.
Code is auto-formatted with proper indentation.
Copy the formatted code.
The formatter supports multiple popular style conventions and is customizable to match guides like Airbnb, Standard, or Google JavaScript style. You can configure semicolon usage, quote style (single vs. double), trailing commas, bracket spacing, and arrow function parentheses to match your project requirements.
Yes, the formatter parses your JavaScript and detects syntax errors including missing brackets, invalid expressions, unterminated strings, and reserved word misuse. Error messages include line numbers and descriptions to help you quickly locate and fix issues in your code.
Yes, extensive customization is available including indentation style (tabs vs. spaces), quote preference, semicolon insertion, trailing comma rules, bracket placement (same-line vs. new-line), and maximum line width. These match the configuration options of popular tools like Prettier and ESLint.
