JS Formatter
The JavaScript Formatter beautifies minified or messy JavaScript code by adding proper indentation, line breaks, and spacing. Well-formatted JavaScript is easier to read, debug, and maintain. This formatter follows common JS style conventions, adding newlines after statements, indenting blocks, and aligning operators. It is perfect for working with minified production code or cleaning up auto-generated scripts.
Formula
Formatting adds: - Newlines after semicolons - Indentation for blocks (2 spaces) - Spaces around operators - Newlines after braces - Consistent quote style Result: readable JavaScript
Example
Input (minified): function f(a,b){return a+b;} Output (formatted): function f(a, b) { return a + b; }
How to Use
- Paste your JavaScript code into the input field
- Select formatting options (indent, quotes, semicolons)
- Click format to beautify the code
- Review the readable output
- Copy the formatted JavaScript for development
Frequently Asked Questions
What JavaScript formatting style is used?
The formatter uses a style similar to Prettier: 2-space indentation, semicolons, single quotes, trailing commas. This is the most popular JavaScript style in modern development.
Can formatting change JavaScript behavior?
No. Formatting only adds whitespace for readability. The code behavior remains identical. However, be careful with automatic semicolon insertion — missing semicolons can sometimes cause issues after formatting.
Should I format JavaScript for production?
No. Use minified JavaScript for production (smaller file size). Keep formatted JavaScript for development and debugging. Most build tools can format during development and minify for production.
Does the formatter handle modern JavaScript?
Yes. The formatter handles ES6+ syntax including arrow functions, destructuring, template literals, async/await, classes, and modules. It also handles JSX syntax (React) if enabled.
Can I customize the formatting style?
The formatter offers options for indentation size, quote style (single or double), semicolons (required or omitted), and trailing commas. Choose the style that matches your team's convention.