YUI JS Compressor

Tool Guide

Introduction

The online YUI Compressor JS extreme minification tool is a high-compression JS minifier and beautifier designed to emulate the rules of the classic YUI Compressor engine. It supports one-click obfuscation of JS variable names, removal of useless line breaks, deep merging of code spacing, and extreme compression of large front-end JavaScript file sizes at high speed.

Core Features

1. YUI-standard deep minification: Strictly following the classic compression mechanism, it extremely streamlines variable naming, cleans up redundant line-ending semicolons, and seamlessly merges multi-line long code into a single space-saving line.
2. Highly secure local obfuscation: The code obfuscation and local variable name compression logic runs entirely in a closed loop within the browser's local sandbox. No network connection is required, preventing leaks of core code intellectual property.
3. Perfect code syntax highlighting: The code before and after compression is displayed clearly in elegant, tech-styled, modern highlighting panels, making it easy for developers to compare lines character by character.

How to Use

1. Copy and paste the original JavaScript source code you want to optimize into the original input box on the left/top.
2. In the control panel, choose whether to enable Mangle Variable Names and whether to remove all JS comments, as needed.
3. Click "Compress JS Code", and the system will instantly output the extremely compressed single-line obfuscated code on the right/below. Copy the code with one click or download it directly as a `.min.js` file.