Free JavaScript Formatter

Clean up your JavaScript code. Convert minified or messy JS into properly indented, readable code.

JavaScript Formatter

Work Steps

Step 1
Enter your age in days, months, and years in the text box.
Step 2
You will see your current age.

Options

Indent Size
2 or 4 spaces.
Brace Style
Allman, K&R, or Stroustrup.
Minify
Compress code for production.

Frequently Asked Questions

What is JavaScript Formatter and what is it used for?

A JavaScript formatter restructures JavaScript with consistent indentation, spacing, and line breaks to improve readability.

Paste JavaScript into the formatter and generate the formatted output. Review it before using it in production.

Formatters should preserve program behavior, but invalid syntax, unusual parser features, or different formatter settings can affect the result.

Formatting is useful for code review, debugging, collaboration, and maintaining consistent style.

It can make minified or compressed JavaScript readable again, although it cannot restore meaningful variable names removed by minification.

If formatting fails, check syntax errors, unsupported language features, and parser/version compatibility.