What Is Zalgo Text?

Published July 15, 2026 · 7 min read

Z̸͎̈a̷̭͐l̶̰̏g̵̬͝o̷̗͝ text — also called glitch text, cursed text, or corrupted text — looks like your font is falling apart. It is not a font, a bug, or a virus. It is a deliberate exploit of one specific rule in the Unicode standard, and once you know the rule, the whole effect is obvious.

The Mechanism: Combining Characters

Unicode has to represent every accented letter in every language. There are two ways to do that. One is a precomposed character: é has its own code point, U+00E9. The other is composition: write a plain e, then follow it with U+0301, COMBINING ACUTE ACCENT. The renderer draws the accent on top of the previous character rather than beside it.

Combining marks live in several blocks, the main one being Combining Diacritical Marks at U+0300–U+036F. It contains around 112 marks: accents, tildes, rings, dots, macrons, and a set of marks that sit below the letter instead of above.

Here is the part that makes Zalgo possible: the standard does not limit how many combining marks can attach to a single base character. Real languages rarely need more than two or three, but nothing forbids fifty. Attach fifty, and the renderer dutifully stacks fifty marks, each positioned slightly further from the letter than the last. The result climbs above the line and drips below it.

What a Generator Actually Does

A Zalgo generator is a short loop. For each character in your input, it appends a random selection of combining marks drawn from three groups:

• Up marks — accents, circumflexes, rings, and dots that render above the letter
• Down marks — cedillas, rings below, and dots below that render underneath
• Middle marks — strikes, overlays, and slashes that render through the letter

Intensity is just the number of marks per character. A "mild" setting adds two or three; "maximum" might add thirty. That is the entire algorithm — you can try the different intensities in our glitch text generator.

Where the Name Comes From

Zalgo started as a 2004 internet meme: comic strips and panels edited so that a character's dialogue degraded into corrupted, overflowing text, invoking an eldritch entity called Zalgo. The recurring line — "he comes" — and the visual of text spilling out of its panel became the meme's signature.

When people worked out that Unicode combining marks could reproduce that look in plain text, the name transferred to the technique. It spread through Something Awful, 4chan, and Tumblr through the late 2000s, and generators started appearing shortly after. Today it survives mostly in horror-adjacent usernames, ARG aesthetics, and Halloween posts.

Where It Works and Where It Gets Stripped

Zalgo is the least portable of all the Unicode text effects, because platforms have an active reason to block it: text that overflows its own line box can cover other elements on the page.

• Discord: renders in messages, though the client clips overflow so tall stacks get cut off. Names and status are more restricted.
• Twitter/X: renders in posts, with clipping at the line boundary.
• Reddit: renders in comments on old and new UI, clipped.
• Instagram and TikTok: usually normalized away in bios and names.
• Most modern comment systems: strip or cap combining marks as standard input sanitization.
• Games and chat overlays: almost always filtered.

If you want a corrupted look that survives everywhere, a lighter approach works better: a strikethrough or slash overlay from our strikethrough generator, or a low-intensity glitch with two or three marks per character rather than thirty.

Is It Harmful?

No. Zalgo text is data, not code — it cannot execute anything, install anything, or exploit a browser. The only genuine concern is performance: a string with tens of thousands of combining marks makes text shaping expensive, and on an older phone that can visibly stall the rendering of a page. This is why "crash your friend's phone" claims occasionally attach to it. In practice, modern text engines handle it fine, and platforms cap the input length anyway.

Two more practical downsides worth knowing:

• Accessibility: screen readers announce combining marks individually or fail on them entirely. Zalgo text is effectively unreadable to anyone using assistive technology.
• Searchability: the underlying letters are intact, but the marks between them break most text matching, so Zalgo names are hard to find.

Removing Zalgo From Text

Because the base letters are unchanged, cleaning Zalgo text is straightforward: delete every character in the combining ranges — primarily U+0300–U+036F, plus the smaller Combining Diacritical Marks Extended, Supplement, and For Symbols blocks. In most languages that is a one-line regular expression, and what remains is your original string. This is exactly what platform sanitizers do before storing user input.

Related Unicode Effects

Combining marks power a few other tricks worth knowing:

• Strikethrough — U+0336 COMBINING LONG STROKE OVERLAY on every character
• Underline — U+0332 COMBINING LOW LINE, which works in places that have no formatting support
• Slashed text — U+0337 or U+0338 for a diagonal cut through each letter

All three are the same mechanism as Zalgo, just applied once instead of thirty times — which is why they are far more portable.

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