AI Text Cleaner
Remove invisible characters (zero-width, non-break spaces, AI watermarks) and normalize quotes.
About this tool
Clean text from invisible Unicode characters that LLMs sometimes insert as watermarks: zero-width space, zero-width joiner, non-breaking space, soft hyphen and more. Also normalizes smart quotes, em-dashes and ellipsis to plain ASCII. Runs entirely in your browser, your text is never sent anywhere.
Why would AI-generated text contain invisible characters?
Some models emit Unicode characters that look like normal space but encode differently. Pasted into a form or a CMS, they can break searches, regex and word counts, and can be used as fingerprints.
What does the cleaner actually remove?
Zero-width characters (U+200B/200C/200D/FEFF), the Word Joiner, soft hyphens, non-breaking spaces, and other invisible separators. Optionally it replaces curly quotes, em-dashes and ellipsis with plain ASCII equivalents.