Best YUI Compressor Alternatives & Competitors in 2025

JavaScript Obfuscator is a free online tool that obfuscates your source code, preventing it from being stolen and used without permission.

Key JavaScript Obfuscator features:

Increased Code Security Protection from Reverse Engineering Deterrence against Hackers Preservation of Functionality

Open Source

JavaScript parser, mangler, optimizer and beautifier toolkit for ES6+.

Key Terser features:

Highly Effective Minification ES6+ Support Source Maps Plugin Friendly

Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

Key Netumo features:

Monitoring SSL Monitoring Twitter SMS notifications

Try for free freemium $9.0 / Monthly (Lite plan)

JavaScript minifier, beautifier, mangler and parser toolkit.

Key UglifyJS features:

Minification Maturity and Stability Customization Compression

Open Source

The Closure Compiler is a tool for making JavaScript download and run faster.

Key Closure Compiler features:

Advanced Optimizations Code Minification Dead Code Elimination Code Warnings and Checks

Open Source

Free code snippet to lock javascript files to your domain. Protect javascript code. Easy cut & paste script. Prevent unauthorized use of your scripts and deter code theft.

Key DomainLockJS features:

Easy Implementation Customizable Restrictions Obfuscation Automated Blocking

Gnirts is a JavaScript library for obfuscating string literals by encoding them as different string literals.

Key Gnirts features:

String Obfuscation Ease of Use Lightweight

Jscrambler is a JavaScript protection solution that makes apps self-defensive, resilient against tampering, malware injection, & code theft.

Key Jscrambler features:

Code Protection Self-Defending Code Real-Time Monitoring Compliance

Open Source

Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.

Key Webpack features:

Modular Bundling Code Splitting Hot Module Replacement (HMR) Advanced Configuration

Open Source

Online Javascript Minifier compresses, minifies javascript code to make it more optimized, efficient and it improves website load time by decreasing file sizes.

Obfuscator-loader is an all-in-one module loader that has the capability to Obfuscate module sources using Javascript Obfuscator.

Closure is a Fabulous, 2D, Casual, Puzzle-Platform, Single player video game created and published by Eyebrow Interactive.

A tool to format C/C++/Java/JavaScript/Objective-C/Protobuf code.

Key ClangFormat features:

Consistency Automation Integration Configurability

Open Source

astyle, code formatting.