The Creepypasta Font
Hey everyone, Adeel here! If you spend any time on Reddit, Discord, or YouTube comment sections, you have almost certainly encountered a post that looks like a demonic entity took over the user's keyboard. The text stretches up into the previous comment, drips down into the next paragraph, and looks completely broken.
This phenomenon is famously known as Zalgo Text. It gets its name from an old internet creepypasta about a fictional, chaotic deity named Zalgo who corrupts reality. But despite looking like a severe computer virus or a hacked website, Zalgo text is perfectly valid code. Today, I'm going to explain exactly how it works and why standard web browsers allow it to happen.
What Exactly is Zalgo Text?
Zalgo text is not a custom font, and it is not an image. It is standard digital text that has been heavily manipulated using a specific feature of the Unicode standard. Here is an example of what it looks like: Tฬดฬฝฬ ฬฬฬฐhฬตฬฬอฬกiฬตฬอฬ ฬsฬตฬออฬอ ฬตฬฬฬกฬกอiฬตอฬฬsฬตอฬฬฆ ฬถฬฬฬกฬณZฬตอฬฬคaฬตฬฟอฬฎฬฌlฬตอฬฬgฬตฬฬฬฬoฬตฬฬฬ ฬทฬฝฬฬนTฬตฬฬฬ eฬตฬฬฬxฬตฬ อฬtฬตฬฬฬ
To understand why this happens, we have to look at how modern computers process languages from all over the world.
The Unicode Combining Hack
As I mentioned in my previous guide on ASCII, early computers only supported basic English letters. When the industry shifted to the Unicode standard to support global languages, they ran into a problem: how do you handle languages that use accents, accents on top of accents, or complex phonetic marks (like Arabic, Hebrew, or Thai)?
Instead of creating millions of individual characters for every possible combination of a letter and an accent, the creators of Unicode invented Combining Characters.
A combining character is a special Unicode symbol that does not take up any horizontal space. Instead, it "attaches" itself to the letter immediately preceding it.
For example, to create the letter รฉ, the computer types a standard e, and then types a combining acute accent character (U+0301). The browser visually merges them together. Zalgo text exploits this exact feature by taking a single normal letter and attaching 50, 100, or even 500 random combining characters to it.
How It Breaks HTML Layouts
Web developers use CSS (Cascading Style Sheets) to keep text neatly contained inside div boxes and paragraphs. They set line heights and margins to make the text readable.
However, web browsers are programmed to always render text, even if it overflows. Because combining characters stack vertically (going infinitely up and down), a heavily manipulated Zalgo word will violently break out of its HTML container, overlapping navigation bars, images, and other comments.
Are There Cybersecurity Risks?
Visually, Zalgo text is just annoying. But from a backend perspective, it can be dangerous if a website's database is poorly configured. This is known as a Buffer Overflow Attack.
If a web form asks for a "First Name" and restricts it to 20 characters, a user might submit a 10-character name. However, if they attach 5,000 invisible combining characters to those 10 letters, the raw data size becomes massive. If the server tries to process that much unexpected data, it can crash the database or slow down the server (a basic Denial of Service attack).
How to Remove Zalgo Glitches
If you are a moderator on a forum or managing a database, you must sanitize user inputs. In JavaScript, you can use a simple Regex formula to strip out combining characters:
function removeZalgo(text) {
// This regex targets the Unicode combining marks block
return text.replace(/[\u0300-\u036F\u1AB0-\u1AFF\u1DC0-\u1DFF\u20D0-\u20FF\uFE20-\uFE2F]/g, '');
}If you don't want to code this manually, you can paste glitched text into the DIO Remove Spaces PRO tool. I specifically programmed its background algorithm to detect and strip Zalgo combining marks, returning perfectly clean, readable text instantly.
Final Thoughts
Zalgo text is a brilliant example of users finding a creative, chaotic use for a system built for pure utility. What was designed to help type French accents ended up being used to create demonic internet memes.
As web developers, it is a constant reminder that we must always expect users to break our input fields in the most unexpected ways possible. Always sanitize your data!
Keep your databases clean, and I'll catch you in the next guide.
Adeel Rehman
Founder & CEO at DIO Pakistan & AR Online Services & DIO Tools Hub | 7+ Years of Proven Expertise in Digital Marketing, SEO & WordPress | Expert Graphic Designer | Google Certified | University of London