Text ZALGifier

README.md

ZALGO

T̵̸̴̙͒̈̑ͅͅh̢̢̬̳̱͔͕͐̽ë̗͉̲̲ͫ̓̕͠ ̪̰̣̔̑͌̐̌͢C̪͎͎̜ͤ̂ͪ̀͢h̙̦̝̎͛̇ͬ͂ͬä̴̢̺̹̮̰́̏͘o͒̕͏ͨ̀̌̂̌͠s̜̪̣͕̠̓͊͐͡ ̛̜̤̪ͤ͊̌̄͊S̰̻̖͙ͪ̆̈́̐͝c̛͎̫͚̣̞̝ͧ̕r̸̟̙ͧ͛ͩ́ͫ͜i̬̻͖̅ͨ̏̀̚͘p̯̲̜ͨ͒̑̑̕̕ṫ͚̲̫̆̒ͣ͠ͅ.̱̻̲̀͂͏̠ͧͦ ͚̩͛͐̾̒̀͝ͅH̡͙̙̀ͬ̇̚̚͢E͙͙̦͙̱ͫ̇ͪ̈ ̣͚̗̱ͬͬ̐͂̃Ĉ̨̩̠̍̅́̍͡O̪̖ͤͬ̐̍ͮ̋ͨM̨͇̭̗̜̗͒͟͝E̸̤̗̱̘ͦ͛͢ͅS͚ͧ̎ͭͥ̈̂͢͡.̮͎͓̓̀ͤ̽͗̕.͇͛͋͏̬̘ͤ͌͛.̢̡̳̰͓͑̑̋͊

Usage

zalgo("Your text")

or you can specify the optional zalgifying density (default is 9, suitable for most cases):

zalgo("Your text",15)

Current implementation is just 129 ͔̭͇ͥ͌̓̍̉͠b̷̨͕̝̞̅̔̎̿y̢͖͉͊ͣͫ̓̌̕.̙͔̠̐ͮͤ̍̅͝.̙̺̺̦̺͍ͦ̊͘.̮̬̭̥ͣ̀ͫ͢͠ ͉ͧ̅̾ͬ͏̠̓͜Ò̶̞͖̳̗͔͙̔H̵͍̳̦͂̂̐͘̚ ̟̰̘̄ͥ̐̒͗ͅN̟͏̭͔̪͛ͪ̉͂O̗̹͒̀͛ͪ̅͘̕!̡̜͎̈́͆̐͒͂ͣ ͍̗̤̯̣ͮ̈́̔ͅH̶̨͈̳̎͋͗͂̎E̢̧̧̦̩͓͇ͣ͐ ̖̣̦͓͆̈́͜͢͜C̟̦͎̼ͩ̔͘͜͟Ö̭̜̰̇ͧ̈́̔͝M̠͛͛͆͊̒͌̍̋Ȇ̟̬̗̱ͮ̓̈́͘S̵̭̪̮̓ͩ̍́͢ ͉̯͇̦ͥ͗͊͛̈A͚͕̺̔̐̔͛̈́͜G̸̛̤̳̻ͫ̚͢͡Ą̣͚̱̺̎̄̌ͅÌ̛͍̯͛ͤ̊͂́N̨̨͍͇̋̓͐ͤ͟

index.js

function(z,a,l,g,o){for(l=z.length*(a=a||9),g=-1,o='';++g<l;o+=g%a?String.fromCharCode(768+Math.random()*111|0):z[g/a]);return o}

LICENSE.txt

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2013 plugnburn

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

package.json

{
  "name": "zalgo",

  "description": "Zalgify your text!",

  "keywords": [
    "zalgo",
    "string",
    "masking",
    "chaos",
    "encoding"
  ]
}

Btw, your code is not identical as it doesn't provide the default density. And emits some undefined value because of <=l, not <l.
So, the correct version would be:

function(z,a,l,g,o){for(l=z.length*(a=a||9),g=-1,o='';++g<l;o+=g%a?String.fromCharCode(768+Math.random()*111|0):z[g/a]);return o}

Anyway, thanks for the hint. Updated.

.charAt is for IE<10 compatibility.

I know what and whom is it for. My utilities are all ES5-oriented and I'm not going to explicitly favor these morons at the cost of simplicity.