Source Code Formatter & Beautifier

Source Code Formatter & Beautifier, is an extension that lets you easily beautify codes in your browser. This addon supports JavaScript, CSS, and HTML as input languages. You can either browser files via the (+) button at the UI (top-left corner) or drag & drop a file in the left textarea. The former method is preferred as the coding language for the input file can be detected automatically and the interface will be updated accordingly (no need to adjust the input language manually).

[+] Features
1. When the UI is closed, a stand-alone popup window is present with no background activities.
2. purely web-based and capable of beautifying HTML, CSS, and Javascript.
3. has many interface-based adjustment options.