Text Watermark Remover logoText Watermark Remover
Clean your text
FreeNo sign-upNothing stored

AI Text Watermark Remover

Remove AI text watermarks from Claude, ChatGPT, Gemini and Grok output. Detect 34+ invisible Unicode characters instantly in your browser, or deep-rewrite statistical watermarks — free, no sign-up, nothing stored.

Remove a watermark nowHow Claude's watermark works
Runs in your browser
0 / 50,000

Line breaks, spaces, and tabs are formatting, not watermarks — we never count or remove them.

1 credit · 9 left

Quick Clean removes invisible characters — free & unlimited
Deep Rewrite rewrites text to break statistical watermarks (Claude-style)

Cleaned text will appear here — paste with Ctrl+V to start

How to Remove Claude Watermark

There are two different kinds of AI text watermark, and removing them takes two different tools. This AI text watermark remover combines both layers in one place — and it is honest about which layer works on which watermark.

Layer A

Character sweep

Quick Clean scans for 34+ invisible Unicode characters — zero-width spaces, narrow no-break spaces, byte-order marks, bidi controls, tag characters — and strips them in one click. Instant against hidden-character watermarks used by ChatGPT and similar tools. Runs 100% locally.

U+200BU+202FU+FEFFU+00ADU+2060+29 more
Layer B

Deep rewrite

Claude's SynthID-Text watermark lives in word choice, not characters — deleting characters can't touch it. Deep Rewrite sends your text through an LLM that paraphrases it, breaking the original statistical pattern. Best-effort: it weakens the watermark, and we say so plainly.

Privacy

Nothing stored

Quick Clean never leaves your browser — you can disconnect from the internet and it still works. Deep Rewrite passes your text through an API exactly once; input and output are never written to a database. No accounts, no logs of your content.

What Are Invisible Unicode Characters?

Unicode contains dozens of code points that occupy space in a string but render no visible glyph. AI tools sometimes embed them as a hidden-character watermark; they also slip in through copy-paste from PDFs and web pages. Here are the most common ones this tool detects:

U+200BZero-Width SpaceThe classic AI watermark character — invisible, but copies everywhere.
U+202FNarrow No-Break SpaceLooks like a space in some fonts, invisible in others; common in ChatGPT output.
U+FEFFByte Order Mark / ZWNBSPA file-format artifact that survives copy-paste as an invisible character.
U+00ADSoft HyphenOnly renders at line breaks; invisible the rest of the time.
U+2060Word JoinerPrevents line breaks without showing any glyph.
U+200E / U+200FLeft-to-Right / Right-to-Left MarkDirectional marks that can hide inside English text.
U+202A–U+202EBidi Control CharactersEmbedding and override controls — can even reorder how text displays.
U+E0000–U+E007FTag CharactersA plane of 128 invisible tags, enough to encode arbitrary hidden payloads.
U+2000–U+200AEn/Em and Hair SpacesEleven space variants that look like ordinary whitespace.
U+3000 / U+205F / U+1680Ideographic, Math & Ogham SpacesMore space lookalikes from other scripts and math typesetting.

How Claude's Watermark Actually Works

No hidden characters. The watermark lives in which words Claude chose.

Anthropic's Claude text watermark is based on SynthID-Text, a statistical scheme. As Claude writes, it nudges its word choices in a direction only the watermark key can verify. The text looks perfectly clean — no zero-width spaces, no strange formatting — because the signal is the sequence of words itself. Think of a die that keeps landing on the digits of pi: every roll looks random, but the sequence is provably not.

ordinary text  : random word choices — no pattern to verify
claude watermark: choices follow a keyed sequence — looks random, verifiably isn't
quick clean    : removes hidden characters → no effect here
deep rewrite  : paraphrases the text → breaks the sequence

This is why every "Unicode cleaner" on the market fails against Claude. If your text came from Claude, use Deep Rewrite — and treat the result as best-effort, since Anthropic's official detector is not public and no tool can promise a complete removal.

Try Deep RewriteRead the FAQ

FAQ

Check your text before you share it

Paste it above, see exactly which watermarks it carries, and remove them — free, instant, and private.

Clean your text now