Why Format or Minify JavaScript?
JavaScript is the programming language that powers interactive web applications. Like CSS, JavaScript files are often minified for production — all comments, whitespace, and meaningful variable names stripped away — to reduce file size and make code harder to casually read.
The inverse problem also happens: JavaScript code found in online examples, auto-generated by tools, or copy-pasted from different sources may be inconsistently formatted or oddly structured. Beautifying it makes the logic clear and easier to understand.
What Does This Tool Do?
This tool either beautifies JavaScript (formats it with consistent indentation and readable structure) or minifies it (produces compact, production-optimized output). Both operations happen instantly in your browser.
How to Use This Tool
- Paste your JavaScript code into the input area.
- Choose Beautify or Minify mode.
- The formatted result appears immediately.
- Copy the output with the copy button.
Common Use Cases
- Inspecting third-party scripts: Beautify a minified library or snippet to understand what it does.
- Debugging: Format auto-generated or obfuscated code to follow the logic.
- Preparing snippets: Minify a small utility script before embedding it inline.
- Code review: Clean up formatting inconsistencies before sharing or reviewing code.
Frequently Asked Questions
Does beautifying obfuscated code make it fully readable?
Beautification restores whitespace and structure, but obfuscated code often uses mangled variable names (like a, b, c). The structure becomes clearer, but the logic may still require analysis to understand.
Is TypeScript supported?
This tool is designed for standard JavaScript. TypeScript-specific syntax (type annotations, interfaces, decorators) may not be parsed correctly. Use a TypeScript-specific formatter for .ts files.
Is my data private?
Yes. All processing happens locally in your browser — no code is sent to any server.