Add glitchy combining diacritics to any text

Create a glitch effect by attaching stacks of real Unicode combining marks above, through, and below each visible character.

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ToolZalgo Text
Input
Output
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Preview

How it works

Every non-space code point is copied before 2, 5, or 10 rounds append one upper mark, one lower mark, and sometimes an overlay mark. A fixed seed of 42 makes the same source and intensity produce identical code points, while medium selects five rounds rather than a Unicode-defined strength.

  • Unicode classifies U+0300–U+036F as combining marks that attach to a preceding base character.
  • Spaces and newlines receive no additions, retaining the original word and line boundaries.

Worked example

Medium-intensity Zalgo effect
Adds combining marks above and below each letter for a glitchy appearance
Input
											Hello
Output
												H̷̴̵̸̪̰̠̱̙̔̀́͌̈ę̸̗̜̘̳̓̓͂̑̚l̶̸̵̖̱̻̝̩̒̈͊̀̚l̶̴̸͇̮̭̘̺̅̋͂̉̈o̸̴̧̘̤̥̦̎̅̎̀̚

When to use this

Game chat uses corrupted-looking messages, horror-themed posts decorate short headings, and Unicode renderer fixtures stress repeated nonspacing marks.

Edge cases

  • An existing combining accent is itself decorated, so decomposed input such as e plus U+0301 accumulates marks on both code points.
  • A space or newline is copied exactly and never receives an above, below, or overlay character.
  • Long mark stacks can confuse screen readers, search, cursor movement, selection, and fonts even though the original base letters remain in the string.

References