JavaScript Minifier & Compressor – Free Online JS Optimization Tool
Minify, compress, and optimize your JavaScript code instantly with our Free Online JS Minifier Tool. This professional-grade JavaScript Compressor removes unnecessary characters, spaces, and comments — transforming your scripts into fast, lightweight, production-ready JS files. Our tool supports multiple input methods, real-time compression analytics, syntax-highlighted previews, and bulk ZIP downloads. Whether you’re a developer or site owner, you can easily boost website speed, improve SEO, and enhance Core Web Vitals with just one click. Enjoy a smooth, responsive interface designed for developers — complete with file management, error handling, and instant performance metrics.
Upload Section
Upload or Paste Your JavaScript Code
Drag & drop JS files, or paste your code directly into the editor. Upload multiple files and instantly see compression results with detailed stats.
Supported formats: .js
Frequently Asked Questions About JS Minifier
Everything you need to know about minifying and optimizing your JavaScript code.
A JavaScript Minifier compresses your JS code by removing unnecessary spaces, line breaks, and comments — resulting in smaller, faster-loading scripts without changing functionality.
Our tool supports .js files. You can upload multiple files and minify them all in one go.
Smaller JS files mean faster page loading, lower bandwidth use, and better SEO performance. It’s a crucial step in front-end optimization and improving Core Web Vitals.
Yes. You can upload several JavaScript files simultaneously, view their compression results, and download them all together in a ZIP archive.
Absolutely. The integrated CodeMirror editor lets you preview your minified code with syntax highlighting, line numbers, and read-only protection.
No. Our tool safely removes unnecessary whitespace and comments while preserving the logic and structure of your JavaScript files.
Yes. All processing happens temporarily and securely. Files are deleted automatically after compression, and nothing is stored on our servers.
Yes. Use the “Copy to Clipboard” feature for quick, one-click access to your optimized JS code.
Completely free — no registration or installation required. Just upload, compress, and download instantly.
Our JS Minifier stands out with:
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Multi-file upload & batch compression
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Real-time compression analytics
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Syntax-highlighted code preview
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Bulk ZIP downloads
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Responsive, developer-friendly interface
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Secure temporary processing