Free Online JavaScript Minifier & Compressor

What is JavaScript Minification?

JavaScript minification (or compression) is the process of removing all unnecessary characters from JavaScript source code without changing its functionality. This includes eliminating whitespace (spaces, tabs, newlines), comments, and sometimes shortening variable names (mangling - not performed by this basic tool) and other more advanced optimizations. The primary goal is to reduce the overall file size of the JavaScript code.

Why Use Our Free JavaScript Minifier?

• Faster Website Load Times: Smaller JavaScript files download more quickly, leading to improved page load speed and a better user experience.
• Reduced Bandwidth Consumption: Minified files use less bandwidth, which benefits both your server and users with slower internet connections or limited data plans.
• Improved Performance Scores: Page speed tools often penalize sites for unminified JavaScript. Minifying your code can help improve these scores.
• Simple & Quick: Paste your JS code, click minify, and get the compressed version instantly.
• Client-Side Processing: Your JavaScript is processed directly in your browser for speed and privacy.
• See Savings: The tool displays original size, minified size, and the percentage of reduction.

How to Use the JavaScript Minifier

• Paste Your JavaScript: Copy your JavaScript code and paste it into the "Input JavaScript" textarea.
• Minify: Click the "Minify JavaScript" button.
• View Minified Code: The compressed JavaScript code will appear in the "Minified JavaScript" textarea.
• Check Statistics: Information about the original size, minified size, and savings will be displayed.
• Copy or Download: Use the "Copy Minified" button to copy the result, or "Download .js" to save it as a JavaScript file.
• Clear: The "Clear" button will empty both input and output fields.

Note: This tool performs basic minification by removing comments and whitespace. It does not perform advanced code transformations like variable renaming (mangling) or dead code elimination, which require more sophisticated parsers (like Terser or UglifyJS). For production-level applications where maximum compression is needed, consider using those advanced tools in your build process.