Link: http://aviaryan.in/mAhLyfeMahRulezz/
This is a normal sane piece of text written by the author of this tool.
What you do with it is none of my business.
dIS 1S a NoRMaL sAnE PIeC3 0F t3xT wrITTEN bY da AuThoR oF thIS TO0l.
waT u D0 wid 1T iZz noNe of maH BuS1neSs.
iF U hve s0Me sUggEsTi0nS oR IdEazz, pLeASe fILe An iSSue OR s3nD a pR. ThAnK yoU.
PS - Contributing is simple, see script.js file. It has all the required transformations. Editing it is as easy as editing a JSON file.
Thanks to @anshumanag on Twitter for the idea.