Overview
Introduction
Zalgo text, the glitchy, "corrupted"-looking style seen in creepypasta and internet memes, is built entirely from ordinary letters stacked with Unicode combining marks.
Building it by hand means randomly layering diacritical marks above, through, and below each character, which is tedious to do consistently by typing.
What Is Zalgo Text Generator?
A generator that inserts a random number of Unicode combining diacritical marks (U+0300-U+036F) after each character, split into marks that render above, through the middle of, and below the base character, at an adjustable intensity.
It runs entirely client-side as part of this site's String Tools collection, so nothing you paste is ever uploaded to a server.
How Zalgo Text Generator Works
For each character, the tool randomly picks a number of marks (roughly scaled by the intensity setting) from each of three curated subsets of the Combining Diacritical Marks block, marks that render above the character, through its middle, and below it, and appends them all directly after that character.
The transformation runs synchronously in JavaScript each time you change the text or intensity, with no network round trip involved, and produces a new random result on every run.
When To Use Zalgo Text Generator
Use it for a creepy or glitchy visual effect in a caption, meme, or spooky-themed message.
It's a fast way to get the effect without manually layering combining marks onto each letter.
Often used alongside Text Underliner and Text Strikethrough Adder.
Features
Advantages
- Adjustable intensity from a light glitch effect to a heavily corrupted look.
- Draws from all three visual placements (above, middle, below) for a fuller effect than a single-direction approach.
Limitations
- At high intensity, the output can be extremely hard to read and may cause rendering slowdowns or line-height issues in some text editors and chat apps.
- This is a novelty Unicode combining-mark effect, not real text formatting, and screen readers generally cannot read zalgo text meaningfully, so it should never be used for anything that needs to remain accessible.
Examples
Best Practices & Notes
Best Practices
- Start at a low intensity (2-3) and increase gradually, since higher intensities become unreadable and heavy very quickly.
- Avoid pasting high-intensity zalgo text into contexts with strict length or character limits, since each character can expand into several combining marks.
Developer Notes
The three mark subsets (`ABOVE_MARKS`, `MIDDLE_MARKS`, `BELOW_MARKS`) are curated, well-attested groupings within U+0300-U+036F rather than the full block, since a few code points in that range (like combining marks used for Greek diacritics) don't visually read as clean "above/below" effects on Latin text; spaces and newlines are skipped so the layout of multi-word or multi-line input isn't visually destroyed by marks accumulating on whitespace.
Zalgo Text Generator Use Cases
- Adding a creepy effect to a Halloween-themed caption
- Creating glitchy meme text
- Styling a spooky-themed username or message
Common Mistakes
- Using a high intensity for text that needs to stay readable; even intensity 4-5 can be difficult to read for unfamiliar viewers.
- Pasting heavy zalgo text into fields with character limits, since combining marks count toward length even though they don't add visible characters.
Tips
- Lower intensities (1-3) still read clearly while giving a subtle glitch hint, which works better for professional-adjacent contexts than a maxed-out effect.