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Indent:

Input

// Sample JavaScript — try the tools on this
function fibonacci(n) {
  if (n <= 1) return n;
  return fibonacci(n - 1) + fibonacci(n - 2);
}

const greet = (name) => {
  const message = "Hello, " + name + "!";
  console.log(message);
  return message;
};

class Calculator {
  constructor() {
    this.history = [];
  }

  add(a, b) {
    const result = a + b;
    this.history.push({ op: "add", a, b, result });
    return result;
  }
}

const calc = new Calculator();
console.log(calc.add(fibonacci(7), 10));
greet("World");

Formatted Output

Formatted code will appear here…

About JS Formatter

Normalizes indentation depth across all lines — leading closing brackets outdent correctly, nested blocks indent consistently, and consecutive blank lines are collapsed to one. Original line structure is preserved. No code leaves your browser.

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