Uncrustify - Banish crusty code with the Uncrustify C/C++/C#/Obj-C/D/Java/Pawn/VALA source code beautifier.
JavaScript Obfuscator - JavaScript Obfuscator is a free online tool that obfuscates your source code, preventing it from being stolen and used without permission.
Artistic Style - astyle, code formatting
Code Beautifier - Code Beautifier CSS Formatter and Optimiser - Online CSS parser and Optimiser
indent.js - Browser or Node library for pure, simple code indentation for JS, JSX, TS, TSX, HTML, CSS, LESS...
Terser - JavaScript parser, mangler, optimizer and beautifier toolkit for ES6+