Formatter
JavaScript Minifier
Minify JavaScript online by removing comments and unnecessary formatting. Compress JavaScript locally in your browser.
Tool
Minify JavaScript online by removing comments and unnecessary formatting. Compress JavaScript locally in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free JavaScript Minifier to reduce JavaScript source size for websites, applications, scripts, and code snippets. Paste JavaScript, remove comments and unnecessary formatting, shorten compatible syntax, and copy or download the minified result. Processing runs directly in your browser, so source code does not need to be sent to an external service.
Examples
- function greet(name) { const message = `Hello, ${name}!`; console.log(message); } greet("World");
- const numbers = [1, 2, 3, 4]; const doubled = numbers.map((number) => number * 2); console.log(doubled);
- document.querySelector(".button")?.addEventListener("click", () => { alert("Clicked"); });
Frequently Asked Questions
What does the JavaScript Minifier change?
It removes comments and unnecessary whitespace and may safely shorten compatible syntax while preserving program behavior.
Does the tool execute my JavaScript?
No. The code is parsed and minified, but it is not intentionally executed by the tool.
Can minification detect invalid JavaScript?
Yes. Syntax errors should be reported when the parser cannot process the input.
Is my JavaScript uploaded?
No. JavaScript parsing and minification run locally in your browser.