Zalgo is a cool text-glitch animation effect that works when you highlight text on a website. It was inspired by a glitch animation called Zell-O (pronounced Zell-oh). The glitch is produced by the computer by adding a certain text or characters to a part of the code. Zalgo takes that same concept and adds it to text.

The effect looks like a piece of code that the website has injected, but it isn't a hack. It was designed as a feature by the website developer. The developer designed the effect so it would work in Chrome and other browsers. The effect works by making text have a certain texture and then changing the color of the background.

Zalgo is a really fun effect and a great way to change text. You can do this on most websites.