JavaScript Minifier

What Is This Tool?

The JavaScript Minifier is a safe, conservative whitespace-and-comment stripper. It removes // line comments and /* */ block comments, and collapses extra blank lines and whitespace, while carefully protecting the contents of string and template literals so a // or /* inside a string is never mistaken for a comment. It does not rename variables, insert or remove semicolons, or perform any AST-level transform. Everything runs locally in your browser.

Examples

Before:

// Adds two numbers together
function add(a, b) {
    /* returns the sum */
    return a + b;
}

const message = "http://example.com is not a comment";
console.log(add(2, 3));

After (minified):

function add(a, b) {
return a + b;
}
const message = "http://example.com is not a comment";
console.log(add(2, 3));

Common Use Cases

• Quickly shrinking a small script or snippet
• Stripping comments before sharing code publicly
• Cleaning up whitespace from pasted or generated code
• Reducing size of an inline <script> block