JavaScript Beautifier
Instantly format, indent, and beautify messy or minified JavaScript code.
Formatting Settings
How to Beautify JavaScript
Paste the Code
Paste your minified, unformatted, or messy JavaScript code directly into the large input text area above.
Adjust Settings
Customize the indentation depth (e.g., 2 spaces, 4 spaces, or Tabs) and choose your preferred brace placement style.
Format & Save
Click "Beautify Code". Instantly copy the cleanly structured output to your clipboard or download it as a .js file.
JS Formatter Features
Intelligent Indentation
Automatically detects block structures, nested loops, objects, and arrays to apply clean, multi-level indentation.
Custom Brace Styles
Supports all major coding standards. Choose whether your curly braces collapse on the same line or expand to a new line.
100% Secure & Local
Your code is parsed and formatted securely using local browser JavaScript. No code is ever uploaded to our servers.
Frequently Asked Questions
A JavaScript Beautifier (or Formatter) takes unreadable, dense, or poorly formatted JavaScript code and reorganizes it. It adds proper line breaks, standardized indentation, and spacing around variables and functions to make the code clean and easy for humans to read and debug.
Yes! If you have a minified file (like app.min.js) that has been compressed into a single line, pasting it here will successfully unpack it into multiple properly indented lines. Note: it will not restore original variable names that were shortened during the minification process.
Collapse: Places the opening curly brace on the same line as the statement (e.g., if (x) {). This is the standard in most JavaScript projects.
Expand: Forces the opening brace onto a new line beneath the statement. This is often preferred by C# or C++ developers.
No. Beautification only alters the whitespace, tabs, and line breaks of your code. It does not alter the execution logic, variables, or syntax. Your code will function exactly exactly as it did before, just much easier to read.
Yes! Because JSON (JavaScript Object Notation) is a subset of JavaScript, this beautifier will flawlessly parse and format large, unreadable blocks of JSON data into a clean, hierarchical structure.
Absolutely not. This tool operates entirely on the client-side within your web browser. The code you paste into the input box is never uploaded, tracked, or stored by our servers.