This is an online weird text generator. It converts normal text into Zalgo, creepy, glitch, crazy & weird text by using unusual Unicode symbols that resemble the normal number and fancy letter characters of the alphabet. It's able to generate weird text fonts symbols from the normal ASCII symbols that you are able to copy and paste font because all the characters in the generator box of the converter are cool & funky characters from the Unicode standard.
The weird glitchy & hacky text is known as "Zalgo | Glitch | Creepy | Crazy text font and is probably what most people are using this converter for. The reason it makes glitchy text fonts is that Unicode has a special notation for diacritic marks (those strange little symbols that are above or below characters that you see in French, Spanish, mathematics notations, etc.).