JavaScript Beautify and Minify
Quickly format or minify small JavaScript snippets in your browser.
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JavaScript input
Output
About JavaScript Beautify and Minify
This JavaScript beautify and minify tool reformats JavaScript for readability or compresses simple snippets by removing comments and extra whitespace. It is useful for debugging copied code, sharing examples and cleaning small inline scripts.
Beautify vs Minify
// Original (minified)
function hello(){var name="World";console.log("Hello, "+name);}
// Beautified
function hello() {
var name = "World";
console.log("Hello, " + name);
}
// Minify removes:
// - Single-line comments (// ...)
// - Multi-line comments (/* ... */)
// - Extra whitespace and newlines
// - Optional semicolons
Code Size Comparison
| Format | Size | Use Case |
|---|---|---|
| Beautified | ~500 bytes | Development, debugging |
| Minified | ~150 bytes | Production, fast loads |
| Gzipped | ~80 bytes | HTTP compression |
Frequently Asked Questions
- What is JavaScript beautification?
- JavaScript beautification is the process of formatting minified or compressed code to improve readability. It adds proper indentation, line breaks after statements, and consistent spacing. This makes code easier to read, debug, and understand, especially when working with minified libraries or obfuscated code.
- What is JavaScript minification?
- JavaScript minification reduces file size by removing whitespace, comments, and unnecessary characters without changing functionality. Techniques include: removing comments (// and /* */), collapsing whitespace, removing semicolons where optional. Minification speeds up page loads by reducing download size.
- When should I use beautify vs minify?
- Use beautify when: reading minified code, debugging production issues, learning from library code, or preparing code for review. Use minify when: preparing code for production, reducing file size for faster loads, or sharing compact code snippets. Development = beautified; Production = minified.
- How does the beautify algorithm work?
- The beautify algorithm: 1) Adds line breaks after semicolons and braces, 2) Indents nested blocks, 3) Trims extra whitespace from each line, 4) Ensures consistent formatting. Example: 'function hello(){console.log("hi");}' becomes properly indented with each statement on its own line.