JavaScript Unminify Online

Unminify JavaScript Online — Unpack and Beautify JS Free

Minified JavaScript is fast to deliver but nearly impossible to read. A JavaScript unminify tool reformats compressed code by adding proper indentation, line breaks, and spacing — turning a single unreadable line into clean, browsable source code.

This tool runs entirely in your browser. Paste any minified or packed JavaScript, click Unminify, and get a human-readable, properly indented version in seconds. Nothing is uploaded to a server.

When Do You Need to Unminify JavaScript?

There are many legitimate reasons to unpack minified JS:

• Debugging a third-party script that was shipped minified
• Understanding what a library or widget does before including it
• Recovering readable code when the source map is missing
• Reviewing vendor code for security or compliance purposes
• Editing a script when the original source file is unavailable

Unminify vs Unpack vs Beautify: What Is the Difference?

Unminify and beautify mean the same thing: restore indentation and whitespace to make compressed code readable. Unpack usually refers to eval-packed scripts (like those compressed with p,a,c,k,e,d packing), which require execution to decode. This tool handles standard minified JavaScript. For eval-packed code, you can manually paste the string argument to see the packed source.

Example: Before and After JavaScript Unminification

function getDiscountedPrice(price,discount){if(discount<=0||discount>=100){return price;}return price-(price*discount/100);}

After unminification:

function getDiscountedPrice(price, discount) {
    if (discount <= 0 || discount >= 100) {
        return price;
    }
    return price - (price * discount / 100);
}