JavaScript Compressor

Compress and minify JavaScript files and NPM packages to optimize performance and reduce file size

Request Feature / Support

5,392+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how JavaScript Compressor processes input data instantly inside your browser.

Sample Input Image dimensions: 4000 x 3000 pixels (File size: 5MB PNG)

Computed Result Output WebP Image: 1920 x 1440 pixels (File size: 350KB, 88% reduction)

Execution Mode Client-Side In-Browser JS

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

About This Tool

This advanced JavaScript and NPM package compressor tool allows you to upload JavaScript files or paste code directly to compress and minify them for production use. The tool uses industry-standard Terser compression library to remove whitespace, comments, and optimize variable names while maintaining functionality. You can customize compression settings including mangle options, compress level, and output format. The tool supports multiple files for NPM package compression and provides detailed statistics about size reduction. All processing happens client-side in your browser for maximum privacy and speed.

Save your calculation history with a free account

How to Use

Upload JavaScript files using the drag-and-drop area or paste code directly
Adjust compression settings (mangle variables, remove comments, compression level)
Click 'Compress JavaScript' to process the files
View the compressed output with size reduction statistics
Download the minified files or copy the compressed code to clipboard

Frequently Asked Questions

Find Quick Answers

Does this tool work with NPM packages containing multiple files?

Yes, you can upload multiple JavaScript files simultaneously, and the tool will compress each file individually while maintaining the file structure for NPM packages.

Is my code safe when using this compressor?

All processing happens entirely in your browser using client-side JavaScript. Your code never leaves your computer, ensuring complete privacy and security.

What compression settings should I use for production code?

For production, enable all compression options: mangle variables, compress code, and remove comments. This provides maximum file size reduction while maintaining functionality.

Can I compress ES6+ modern JavaScript syntax?

Yes, the tool uses Terser which fully supports ES6+ syntax including arrow functions, classes, template literals, and modern JavaScript features.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve