JS Beautifier: Clean, Readable JavaScript Code
Transform messy, minified, or obfuscated JavaScript code into a clean, readable format with our **JS Beautifier**. Whether you are debugging a script, reviewing a colleague's code, or trying to understand a library, our tool instantly formats your JS with proper indentation, spacing, and line breaks.
Auto Formatting
Automatically applies industry-standard formatting rules (indentation, braces, spacing) to make code human-readable.
Debug Faster
It's impossible to find errors in a single line of minified code. Expand it to trace logic and fix bugs efficiently.
Copy & Go
One-click copy functionality lets you take the beautified code straight back to your IDE or text editor.
Why Beautify JavaScript?
JavaScript is often "minified" (compressed) for production websites to save bandwidth. This removes all spaces, newlines, and comments, turning the code into a giant, unreadable block of text.
Beautification (or "pretty printing") reverses this process visually. It doesn't change how the code runs, but it changes how it looks.
- Code Review: Analyze code structure and logic flow easily.
- Learning: Paste code from open-source projects to understand how they implemented complex features.
- De-obfuscation: Make sense of scripts that have been intentionally made hard to read.
Best Practices for Clean Code
While our tool can fix formatting, writing clean code starts with the developer. Here are some tips:
- Consistent Indentation: Stick to either 2 spaces or 4 spaces (tabs) throughout your project.
- Meaningful Variable Names: Use `calculateTotalPrice` instead of `ctp`.
- Comment Your Logic: Explain "why" you did something, not just "what" the code does.
- Keep Functions Small: Each function should do one thing well.
Frequently Asked Questions (FAQ)
Does this tool store my code?
No. The processing happens entirely in your browser using JavaScript. Your code is never sent to our servers, ensuring your intellectual property remains private.
Can it fix syntax errors?
No, a beautifier only changes the *presentation* (formatting) of the code. If your code has a syntax error (like a missing bracket), it will still have that error after beautification, though it might be easier to spot!
Does it work with JSON?
Yes! Since JSON is a subset of JavaScript object syntax, this tool will happily format JSON strings as well. However, for strict JSON validation, we recommend our dedicated **JSON Formatter** tool.