Claude Watermark Remover
Paste text from Claude, ChatGPT or Gemini and strip the invisible characters, em dashes and smart quotes that give AI writing away. Everything runs in your browser.
What is the Claude watermark?
It is not a hidden signature. What people call the Claude or ChatGPT watermark is the formatting fingerprint an AI assistant leaves behind: zero-width Unicode characters you cannot see, em dashes instead of hyphens, curly smart quotes, and Cyrillic letters that look like Latin ones. This tool removes all of them in one pass, locally in your browser, so the text pastes cleanly into code, JSON, a CMS or a document.
Runs entirely in your browser. Nothing is uploaded or stored.
This only touches invisible characters and typography. It does not try to detect or evade AI-content detectors, and it will not touch authenticity metadata (like C2PA Content Credentials) on images.
Cleanup options
Remove invisible characters
Zero-width spaces, joiners, and other characters that don't show up but can break strings, regex, and diffs.
Straighten smart quotes
Curly quotes become plain " and ', which is safer inside code and JSON strings.
Normalize dashes & ellipsis
Em and en dashes become a plain hyphen, … becomes three dots.
Collapse repeated spaces
Multiple spaces in a row become one. Leading indentation is left untouched.
Normalize look-alike letters
Replaces common Cyrillic/Greek letters that look like Latin ones (e.g. Cyrillic "а" → "a") with their Latin equivalent. Skip this if your text is actually meant to be in Cyrillic or Greek.
Normalize compatibility characters (NFKC)
Full-width letters and ligatures (like fi) become plain ASCII. It can also change symbols, turning ™ into "TM", so it is off by default.
Paste some text on the left and click "Clean text" to see the result here.