JavaScript Formatter / Prettier

Make your JavaScript code readable, structured, and easy to maintain

Enhanced Readability

Proper indentation makes JavaScript easier to understand and maintain

Debug Faster

Spot syntax errors and logical issues at a glance

Privacy First

All processing happens locally in your browser

Custom Indentation

Choose between 1‑5 spaces to match your style guide

Online Free JavaScript Formatter / Prettier

Transform messy, minified, or poorly indented JavaScript into clean, readable code.

Pro Tip: Use this formatter before committing code or when collaborating with teams – consistent style reduces merge conflicts and improves code reviews.

Why Format Your JavaScript?

Team Collaboration

Consistent style reduces friction in code reviews
Easier to understand and modify others’ code
Helps maintain a professional codebase

Debugging & Maintenance

Spot missing brackets, semicolons, and scope errors
Understand complex logic and callbacks at a glance
Easier to refactor and optimize

How It Works

Our JavaScript formatter processes your code with these steps:

Parse JavaScript

The code is parsed into an Abstract Syntax Tree (AST) to understand its structure.

Apply Indentation

Each block and statement is indented with the number of spaces you selected.

Output Readable Code

The result is a beautifully formatted JavaScript block, ready for review or editing.

Frequently Asked Questions

Sample

const num1 = 5;const num2 = 3;const sum = num1 + num2;console.log('The sum of ' + num1 + ' and ' + num2 + ' is: ' + sum);

Converts to:

const num1 = 5;
const num2 = 3;
const sum = num1 + num2;
console.log('The sum of ' + num1 + ' and ' + num2 + ' is: ' + sum);

Best Practices

Use consistent indentation across your entire project
Combine with a linter (e.g., ESLint) for even cleaner code
Format before committing to version control
Keep your JavaScript files under version control in formatted state

Formatting Benefits

Reduces debugging time by up to 30%
Makes code reviews faster and more effective
Helps new team members understand the codebase quickly