JavaScript Minifier – Compress & Optimize JS Code
Paste your JavaScript below and click Minify to compress it using the Terser engine.
How to Use JavaScript Minifier?
- Paste your JavaScript code into the input editor.
- Click the Minify button to compress your code using Terser.
- View the minified output on the right.
- Copy or download your optimized JS file.
Why Use Our JavaScript Minifier?
Our JavaScript Minifier uses the industry-leading Terser engine to reduce file size, improve website performance, and optimize production builds. Perfect for frontend developers, students, and professionals.
Smaller & Faster JS Files
Minified JS loads faster, reduces bandwidth, and improves Core Web Vitals.
Secure & Private Processing
JS is processed locally when possible; nothing is stored or logged.
Minification is processed locally in your browser using the Terser engine whenever possible. Your JavaScript is never uploaded, stored, or logged, ensuring full privacy and secure optimization.
Explore more developer tools: JS Beautifier · CSS Minifier · JS Editor & Runner
Example: Before & After JS Minification
Here is a sample JavaScript snippet and how it looks after minification:
Before:
function greet(name) {
console.log("Hello " + name);
}
let user = "VINAR TECH";
greet(user);
After Minification:
function greet(o){console.log("Hello "+o)}let user="VINAR TECH";greet(user);Paste your own JavaScript in the editor above to minify it using Terser.
What Does the Terser Engine Optimize?
- Removes whitespace, line breaks, and comments
- Compresses variable and function names (mangling)
- Eliminates unreachable or unused code
- Optimizes expressions for shorter output
- Improves bundle size for faster page loading
These optimizations help reduce JavaScript file size and improve real-world Core Web Vitals performance.