Remove AI watermarks from text
Paste anything written with an AI. The invisible watermark Claude weaves into the words comes out, along with the zero-width characters and look-alike letters that ride along with copied text. Your code, links and emoji are left exactly as they are.
The tool
Original
0 words · 0 chars
Processed
Nothing to inspect yet
Paste text on the left. Invisible characters appear here as amber marks, in the place they occupy.
Model watermark
separate mechanism
Some AI systems encode a statistical signal directly into word or token choices. It is not a character you can look for, so detecting it depends on the specific provider’s method.
The surface signals listed separately are characters, not a model watermark. Finding them does not indicate that text was generated by any particular system.
When a provider publishes a detection method, it is added here, and removal is developed and measured against it. The plan
What it finds
Each of these is a plain fact about the text rather than a guess. A character either is a zero-width space or it is not, so nothing here is scored or estimated.
- Zero-width character
- Takes up no space and is invisible when read. Sometimes used to carry hidden data, often just an artefact of copying between editors.
- Unicode tag character
- Part of a Unicode block that maps one-to-one onto ASCII. It can carry a hidden message that is completely invisible in normal text.
- Variation selector
- Selects an alternate glyph form. Legitimate after emoji and some CJK characters; otherwise it can be used to encode data.
- Bidirectional control
- Changes the direction text is displayed in. Legitimate in right-to-left writing, but can also make text read differently than it is stored.
- Unusual whitespace
- A space character that is not the ordinary one. Usually harmless typesetting, but it survives copying and can be used as a marker.
- Soft hyphen
- An invisible hyphenation hint. It only appears if the word breaks across a line, so it is invisible almost everywhere.
- Look-alike character
- A character from another alphabet that looks like a Latin letter. This is how look-alike domain names and identifiers are built.
- Mixed-script character
- A single word containing letters from more than one alphabet. Rare in genuine text and a common sign of substituted characters.
- Typographic character
- Curly quotes, dashes and similar. Extremely common in ordinary writing from any word processor. Reported for completeness, not as a signal of anything.
The one that hides whole sentences
Unicode reserves a block from U+E0000 to U+E007F called tag characters. The range U+E0020 to U+E007E maps one-to-one onto printable ASCII, so an entire readable sentence can be encoded into characters that render as absolutely nothing. Paste text containing them here and the decoded message is shown back to you.
The same block legitimately builds the Scotland, Wales and England flag emoji, which is why removal is context-aware rather than a blanket strip.
Common questions
- What are invisible characters doing in my text?
- Usually nothing sinister. Copying between a word processor, a web page, a PDF and a chat window picks them up: zero-width spaces from line-breaking logic, non-breaking spaces from layout, soft hyphens from hyphenation. They matter because they survive copying and can break search, comparison, code and form validation.
- Does this remove the watermark Claude puts in text?
- Yes, and it is a separate option from the character cleanup. Anthropic weaves its mark into the choice of words rather than into the characters, so deleting invisible characters cannot touch it. Ticking Claude’s watermark sends the passage to our GPU, which rewrites it sentence by sentence and checks every rewrite against the original, so the meaning, the numbers, the names and the quotations all survive. Every sentence it changes is marked in your text and you can put any of them back.
- Does finding invisible characters mean the text was written by AI?
- No, and this tool never says it does. Invisible characters come from ordinary software: copying between a word processor, a web page and a chat window picks them up. They are worth removing because they break search, comparison and code, not because of where they came from.
- Will this break my emoji or my Persian text?
- No. Zero-width joiners inside emoji sequences, zero-width non-joiners in Persian and Indic scripts, and the tag characters that build flag emoji are detected and deliberately kept. The interface lists exactly what was kept and why.
- What happens to code and links?
- Invisible characters are removed everywhere, including inside code, which is precisely where a hidden character does damage. Visible punctuation is left alone inside code blocks, inline code, URLs, Markdown link targets and HTML tags, because changing a dash or a quote there would change meaning.
- Is my text sent anywhere?
- Only if you ask for the rewriter, which is off until you tick it and asks before it sends anything. Everything else on this page happens in this browser tab. If you do use it, the passage goes to a GPU we rent, is deleted an hour later, and is never logged or used for training.