Terser is described as 'JavaScript parser, mangler, optimizer and beautifier toolkit for ES6+' and is an app in the development category. There are five alternatives to Terser for Web-based, Self-Hosted, Mac, Windows and Linux. The best Terser alternative is Closure Compiler, which is both free and Open Source. Other great apps like Terser are JavaScript Obfuscator, UglifyJS, YUI Compressor and BeautifyTools.
The Closure Compiler is a tool for making JavaScript download and run faster. It is a true compiler for JavaScript. Instead of compiling from a source language to machine code, it compiles from JavaScript to better JavaScript.
This webapp can obfuscate your JavaScript with various levels of protection, including: self-defending code, domain lock and debug protection. It's based on a open source (Node.js) project, so you can run on your own server if you like.
The goal of JavaScript and CSS minification is always to preserve the operational qualities of the code while reducing its overall byte footprint (both in raw terms and after gzipping, as most JavaScript and CSS served from production web servers is gzipped as part of the HTTP...
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Terser has born as an UglifyJS fork (and UglifyJS is now unmantained)