JavaScript Beautifier - Format JS Code Online
Clean up and format your messy, minified, or obfuscated JavaScript code instantly. Our Free JavaScript Beautifier adds proper indentation, spacing, and line breaks to make your JS readable again—all running securely in your local browser.
What is the JS Beautifier?
The JS Beautifier is a developer utility that parses your raw JavaScript code and restructures it into a standardized, highly readable format. Often, developers deal with minified code (where all whitespace is removed to save space) or code written without strict formatting rules. This tool reverses that process, applying consistent indentation and line wrapping. Because it uses client-side parsing, your proprietary source code is never sent to our servers, ensuring absolute privacy.
Why Use Our JS Beautifier?
- Instant Readability: Turns single-line minified code into structured, indented blocks.
- 100% Private: All parsing happens locally on your device. Your code is safe.
- Syntax Highlighting: Easier to spot bugs when code is properly spaced.
- Customizable: Choose your preferred indentation level (spaces or tabs).
How to Use the JS Beautifier
Paste your messy or minified JavaScript into the editor.
Select your formatting preferences (e.g., 2 or 4 spaces for indentation).
Click the 'Beautify' button.
Copy the perfectly formatted code back to your clipboard.
Frequently Asked Questions
No, it only parses the syntax for formatting purposes. It does not run or evaluate your code, so there is no security risk.
Yes. All processing happens entirely within your web browser. Nothing is ever uploaded to an external server.
The beautifier organizes valid code. While it makes it easier for you to spot missing brackets or semicolons, it won't automatically fix broken JS logic.
All file processing is performed locally in your web browser. We do not upload, store, or view your data.