JavaScript Prettifier

Prettify and format JavaScript code instantly with the JavaScript Prettifier Tool. Choose indentation style, remove semicolons, sort object keys, and collapse blank lines. Validate syntax, import .js files, copy or export results, and see character count in real time.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .js
Total characters: 0
Options
Remove trailing semicolons
Sort object keys
Collapse blank lines
Validate input

How to Use:

  1. Paste your JavaScript code into the Input JavaScript box.
  2. Or import a .js or .txt file using the Choose File button.
  3. Adjust options such as:
    • Indentation (2 spaces, 4 spaces, tab)
    • Remove trailing semicolons
    • Sort object keys alphabetically
    • Collapse multiple blank lines
    • Validate JavaScript input
  4. The Prettified Output updates instantly as you type or change options.
  5. Use Copy Output or Export to File to save your formatted code.
  6. Click Clear All to reset the tool.

What the JavaScript Prettifier Tool can do:

  • Applies consistent indentation using your selected style.
  • Removes unnecessary trailing semicolons.
  • Alphabetizes keys inside object literals.
  • Collapses extra blank lines for cleaner structure.
  • Validates code using Function constructor and shows output or syntax error.
  • Tracks total characters in output and supports live preview with border flash.
  • Supports file import, export, clear, and copy functions.

Example:

Input:

var obj={z:9,a:1};function test(){console.log('ok')};

Options Enabled:

  • 2 spaces
  • Sort object keys
  • Remove semicolons

Output:

var obj={a:1, z:9}
function test(){
  console.log('ok')
}

Common Use Cases:

This tool is helpful for developers reviewing or cleaning up messy JS snippets, removing bloat from generated code, or preparing examples for demos or documentation. It’s perfect for fast formatting when working with JS in emails, CMS fields, or when pasting code into slides or blogs.

Useful Tools & Suggestions:

Once your JavaScript is cleaned up, JavaScript Minifier can shrink it down for faster loading without changing how it runs. And if your script relies on structured data, JSON Prettifier is a handy companion to clean up any embedded or external config files you’re working with.

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