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All ToolsJavaScript Beautifier
JavaScript Beautifier
Format and beautify JavaScript code with proper indentation — paste minified JS and get clean, readable code instantly.
What is JavaScript Beautifier?
JavaScript Beautifier is a free online tool that formats and indents JavaScript code. Paste minified or messy JS and get clean, readable code with proper indentation instantly.
How It Works
The formatter tracks bracket depth and indents each statement accordingly, placing opening braces, closing braces, and statements on their own lines — all processed in your browser without any uploads.
How to Use
- 1
Paste your JavaScript
Paste minified or obfuscated JavaScript into the editor.
- 2
Beautify
Click "Beautify JS" to reformat the code with proper indentation and readable spacing.
- 3
Set preferences (optional)
Choose indent size (2 or 4 spaces), brace style, and whether to preserve blank lines.
- 4
Copy or download
Copy the formatted code or save it as a .js file.
Who Uses This Tool
🔍
Debugging Minified Code
Expand third-party or bundled JavaScript into readable form so you can step through logic and find bugs.
📦
Inspecting NPM Packages
Beautify source files inside node_modules to understand how a library works before using it.
🎓
Learning from Examples
Reformat minified code samples found online to study the underlying patterns and techniques.
🔄
Code Review Prep
Clean up poorly formatted JavaScript before submitting it for peer review or merging into a repository.
🛠️
Legacy Code Refactoring
Reindent old or auto-generated JavaScript files to make them easier to read and refactor.
📋
Copying Snippets Cleanly
Format a code snippet before pasting it into documentation, a blog post, or a presentation slide.
Why Choose This Tool
Instant Browser Processing
Your JavaScript is formatted entirely in the browser — no server round-trip means results appear in milliseconds.
No Upload Required
Code never leaves your machine, so sensitive business logic and API keys stay completely private.
Handles Minified Input
Designed specifically for minified single-line code, the formatter correctly expands even tightly packed bundles.
String-Safe Parsing
The tokenizer respects string literals so brackets and semicolons inside quotes are never misinterpreted.
Preserves Logic Exactly
Only whitespace and indentation change — variable names, operators, and all logic remain byte-for-byte identical.
One-Click Copy
Copy the entire formatted output to your clipboard with a single button, ready to paste into your editor.
Key Benefits
- Formats JS with 2-space indentation
- Handles nested functions and objects
- Preserves string contents
- Copy output with one click
- 100% browser-based — no uploads
Frequently Asked Questions
Also Known As
javascript beautifier online freeformat javascript code onlinejs code formatter browserbeautify minified javascriptonline javascript indenterpretty print js codeunminify javascript onlinejavascript code formatter no install
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