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Developer Utility

JavaScript Formatter

Format or minify JavaScript code, remove comments, and check function count, variable count, line count, character count, and compression rate.

Format JavaScript Code Organize messy JS code into a readable structure based on functions, conditions, and loops.
Minify & Remove Comments Remove whitespace, line breaks, and comments to prepare JavaScript for deployment checks.
Statistics & Download Check function count, variable count, line count, character count, and compression rate, then save the result as a file.

JavaScript Code Input

Paste JavaScript code to format or minify, then choose the conversion option you need.

Functions 0 Variables 0 0 lines 0 chars Compression 0%

Conversion Result

Review formatted or minified JavaScript and copy or save it as a file.

Ready 
Enter JavaScript code, then click Format or Minify.

Compare JavaScript Workflows

Choose formatting, minifying, comment removal, or download features based on your task.

JS Formatter

Organizes functions, conditions, loops, and object structures with line breaks and indentation. Useful for debugging and refactoring.

JS Minifier

Removes unnecessary whitespace and line breaks to shorten JavaScript. Useful for checking file size before deployment.

JS Download

Save formatted or minified results as a .js file for utility scripts, blog features, or project cleanup.

Help

What is JavaScript Formatter?

JavaScript Formatter is a free developer utility that formats compressed or messy JavaScript into a readable structure and can also minify it by removing whitespace and line breaks.

Useful for website script editing, blog feature code cleanup, frontend debugging, event handler reviews, utility page JavaScript checks, and JS refactoring.

Supported Features

  • Automatic JavaScript indentation and line-break formatting
  • Single-line JavaScript minification
  • JavaScript comment removal option
  • 2-space, 4-space, and tab indentation
  • Function count, variable count, line count, character count, and compression rate
  • Copy results and download JS files

Useful For

  • Restoring compressed JavaScript into a readable format
  • Analyzing JS code copied from web pages
  • Cleaning scripts before editing blog or Tistory themes
  • Reviewing functions, event listeners, and condition structures
  • Checking structure before JavaScript refactoring
  • Checking JavaScript compression results before deployment
How do I use auto format?

When enabled, the result area updates automatically using the selected indentation as you type JavaScript code.

When should I use JavaScript comment removal?

Enable comment removal when creating deployment-ready JS or reducing code length.

How is compression rate calculated?

Compression rate compares the original JavaScript length with the result length and displays the percentage reduction.

Does it automatically fix invalid JavaScript?

No. This tool formats and minifies JavaScript but does not fully validate or repair unclosed braces, invalid function declarations, or string errors.

Can I use minified JavaScript directly?

Always test minified JavaScript in a staging environment before applying it to a production website.