JavaScript Minifier Online

Compress JS · Reduce file size · 100% client-side

Input JavaScript

Minified Output

(Output will appear here)

How to use the JavaScript Minifier

Paste any JavaScript code and click Minify JS. The tool removes whitespace, comments, and shortens variable names where safe. All processing is 100% client-side — your code never leaves your browser.

Why minify JavaScript?

JavaScript is one of the heaviest resources on web pages. Minifying JS can reduce file size by 30-60%, directly improving page load times, Core Web Vitals, and SEO rankings. Google explicitly recommends minimizing JavaScript for better user experience.

SEO Impact

Render-blocking JavaScript delays page interactivity. Smaller JS files mean faster Largest Contentful Paint (LCP) and Time to Interactive (TTI) — both Core Web Vitals signals that Google uses for ranking.

FAQ

Does minification change JS behavior?No, only whitespace and comments are removed. Variable names are shortened safely.

Is my code secure?Yes, all processing is local. Your code is never transmitted anywhere.