Invisible Character Remover
Paste text below to find and strip hidden Unicode characters. Free, instant, no limit.
How it works
- 1Paste any text. No word limit, and nothing is sent to a server; the check runs entirely in your browser.
- 2We scan for zero-width characters, the deprecated Unicode Tag block, and the Variation Selectors Supplement, all of which have no legitimate use in typed text and are documented ways to embed hidden data.
- 3If any are found, you get a breakdown of exactly what was found and a cleaned copy with them stripped out.
Frequently asked questions
What are these hidden characters?
Unicode has characters that render as nothing: zero-width spaces, word joiners, a deprecated "tag" block originally meant for language tags, and a "variation selector" supplement block that's become a known way to encode arbitrary hidden bytes, one per character. None of these appear when you type normally, so finding them in pasted text is a real, literal signal that something inserted them deliberately. That's unlike stylistic AI-writing patterns, which are just a probability estimate.
Is this the same as the AI-writing detector?
No, it's a different, complementary check. This one is purely mechanical (does the text contain specific invisible code points, yes or no), while the detector estimates whether text reads as AI-written based on style. Worth running both: try the Claude Watermark Detector for the stylistic side.
Does this cost anything or require signup?
No, this check is free, instant, and unlimited for everyone, since it runs in your browser with no server call and no AI model involved.
I want more than cleaning. Can it also rewrite the text?
Yes, use the Claude Watermark Remover. It strips these same hidden characters automatically as part of rewriting the text to reduce AI-writing patterns too.