JavaScript Beautifier

JavaScript Beautifier & Formatter Online

This online JavaScript beautifier and formatter cleans, prettifies, and formats minified or messy JavaScript into consistent, readable code. The tool runs in your browser so there is no installation required. Paste your code or upload file, select formatting options, and get instantly readable JavaScript you can copy or download.

Key features

• Javascript beautifier online with one click
• Format code javascript online or use as a JS code formatter online
• Tons of customization options to format code online instantly
• Keep arrays and chains readable with advanced chain handling
• Wrap long lines at a configurable wrap length
• Settings to match your project style or standard guidelines

How to use this JavaScript formatter

1. Paste raw, minified, or crowded JavaScript into the left editor
2. Pick indent size, indent char, brace style, and function spacing
3. Toggle Keep Newlines if you want to preserve human placed breaks
4. Click the Beautify or Format button to run the js formatter online
5. Copy the formatted JavaScript or download the file for your project

Example 1: Minified vs beautified

function greet(n){return"Hello, "+n+"!"}function factorial(n){return n<=1?1:n*factorial(n-1)}function randomHex(){return"#"+Math.floor(Math.random()*16777215).toString(16)}console.log(greet("Alice"));console.log("Factorial of 5:",factorial(5));console.log("Random Color:",randomHex());

function greet(n) {
    return "Hello, " + n + "!"
}

function factorial(n) {
    return n <= 1 ? 1 : n * factorial(n - 1)
}

function randomHex() {
    return "#" + Math.floor(Math.random() * 16777215).toString(16)
}
console.log(greet("Alice"));
console.log("Factorial of 5:", factorial(5));
console.log("Random Color:", randomHex());

Example 2: Complex snippet

function formatString(e,...t){return e.replace(/{(d+)}/g,(e,n)=>void 0!==t[n]?t[n]:e)}function validateEmail(e){return/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,}$/.test(e)}function debounce(t,n){let u;return(...e)=>{clearTimeout(u),u=setTimeout(()=>t(...e),n)}}function throttle(t,n){let u=!1;return(...e)=>{u||(t(...e),u=!0,setTimeout(()=>u=!1,n))}}

function formatString(e, ...t) {
    return e.replace(/{(d+)}/g, (e, n) => void 0 !== t[n] ? t[n] : e)
}

function validateEmail(e) {
    return /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,}$/.test(e)
}

function debounce(t, n) {
    let u;
    return (...e) => {
        clearTimeout(u), u = setTimeout(() => t(...e), n)
    }
}

function throttle(t, n) {
    let u = !1;
    return (...e) => {
        u || (t(...e), u = !0, setTimeout(() => u = !1, n))
    }
}

Customization options

Adjust these settings to match your team style or personal preference. Use the Defaults control to restore recommended values.

Why use this JavaScript beautifier and formatter

A consistent formatter reduces cognitive load when reading code and keeps diffs clean in version control. Use this online JS formatter to enforce project style, speed up code reviews, and make automated formatting part of your build and CI process. This tool works as a quick JS prettify online helper and as a reliable code formatter for teams.

Best practices for formatting JS code

• Adopt a single style guide
• Use a JS formatter like Prettier on VS Code
• Enable format on save in your editor
• Run the formatter in pre commit hooks
• Document indent, brace, and wrap rules
• Use spaces or tabs consistently
• Integrate formatter with linting for auto fixes
• Generate source maps for transpiled code
• Format before running tests
• Run the formatter in CI for repeatable builds
• Store formatter config in the repo (.prettierrc or similar)
• Minify builds for production, keep beautified source for development

Conclusion

This JavaScript beautifier and formatter is designed to make code clearer and easier to maintain. It supports a wide set of options so you can match project standards or personal preference. Use it to beautify or format JS code instantly without any headache or setup.