Extra caution is recommended when installing recently uploaded/updated scripts (read more)
Be sure you trust any scripts you install

nopaste.voric.com - JavaScript Code Beautifier

This script adds a little 'Beautify' link to pretty-print and nicely indent your code.

Script works like this:
You have messy Javascript Code, for example a compressed MooTools-File:

Then you click the little "Beautify" Link:

This will request the beautified source code from a server, and update the code you see on the page:

Unfortunately, you will have to beautify the code every time you visit the page. Also, the line numbers on the left arent correct.

You could comment on this script if you were logged in.