Runs 100% in your browser — nothing is uploaded
Claude Watermark Remover
Free tool to clean text from Claude, ChatGPT, Gemini and other AI assistants. This AI watermark remover strips hidden zero-width characters, invisible spaces and other unicode markers — and tells you straight what it cannot touch.
Free · no sign-up · nothing leaves your browser
Statistics appear here once you paste some text.
Detect AI watermarks
Find the hidden characters detection systems use to fingerprint content from Claude and other AI tools.
Clean AI text
Remove zero-width spaces, zero-width joiners and every other invisible character in one pass.
See what was removed
Detailed statistics on every watermark character found, named by its unicode code point.
Remove em dashes
Detect and handle em dashes, en dashes and two-em dashes — replace with hyphens or remove with smart spacing.
How does AI watermarking work?
Three different things get called a watermark, and telling them apart decides whether any tool can help you.
Embedded text watermark
Cannot be removed
A statistical bias in which words the model chose, keyed to a secret. Nothing is inserted, so there is nothing to delete. This is what Claude now uses.
Invisible unicode characters
Removed by this tool
Zero-width spaces, joiners, bidi marks and lookalike spaces riding along in the copy-paste. Common, disruptive, and trivially stripped.
C2PA file metadata
Removed by re-encoding
Signed provenance attached to generated image files. Lost through format conversion or re-saving — which is what our image tool does.
Anthropic confirmed on 11 August 2026 that Claude embeds the first kind in all generated text, worldwide, with no opt-out, to satisfy Article 50 of the EU AI Act. Per Anthropic's own documentation the only things that leave no detectable mark are heavy editing, paraphrasing, translation, mixing into other writing, or a passage too short to carry a signal. Deleting characters is not on that list — so be sceptical of any site claiming a one-click fix. The full picture is in the Claude watermark guide.
Free text cleaning tools
Claude Text Watermark Remover
Claude's watermark lives in word choice, not hidden characters. Rewrite word choice to disrupt it. Free, runs in your browser.
ChatGPT Watermark Remover
Detect and strip invisible unicode, zero-width spaces and hidden markers from ChatGPT text. Free and entirely in your browser.
Em Dash Remover — Strip Em Dashes From AI Text
Remove em dashes, en dashes and two-em dashes from AI text, or swap them for plain hyphens. Free, instant, no upload.
Invisible Character Detector
Reveal invisible unicode in any text. Lists every hidden code point with its name and count. Free and client-side.
Zero Width Space Remover
Remove zero width spaces, joiners, non-joiners and byte order marks from your text instantly. Free, runs in your browser.
AI Text Cleaner
Strip invisible unicode, em dashes, smart quotes and messy whitespace from AI output in one pass. Client-side, no upload.
Free Text-Cleaning MCP Server
A free hosted MCP server giving your agent text-cleaning tools. Install in Claude Code, Cursor or VS Code in one line.
Stop AI Using Em Dashes — Skills & Prompts
Install a Claude Skill or paste custom instructions to stop ChatGPT, Claude and Gemini using em dashes and AI filler.
C2PA Metadata Remover
Remove C2PA provenance metadata, EXIF and XMP from AI-generated images. Re-encodes in your browser; files never uploaded.
Guides
Em Dash vs En Dash vs Hyphen
The difference between the em dash, en dash and hyphen, when to use each, and how to type them on Mac and Windows.
How to Type an Em Dash (—)
Every em dash shortcut: Mac (Option+Shift+-), Windows (Alt+0151), Word, Google Docs, iPhone, Linux and HTML.
Why Does AI Use So Many Em Dashes?
ChatGPT and Claude overuse the em dash badly. The real reason it happens, why it signals AI writing, and how to fix it.
Does ChatGPT Watermark Its Text?
OpenAI built a ChatGPT text watermark and never shipped it. What is confirmed, what is myth, and how to check your text.
Does Claude Watermark Its Text?
Since August 2026 Claude embeds a watermark in all generated text, worldwide. What it is, what it proves, what removes it.
Invisible Unicode Characters Explained
A reference to invisible unicode — zero-width spaces, joiners, bidi marks and lookalike spaces — with code points and fixes.
Frequently asked questions about AI watermarks
+ − What is a Claude watermark?
Since August 2026 it means a machine-readable statistical watermark that Anthropic embeds in Claude's generated text at the model level — a pattern in word choice, not hidden characters. The term is also used loosely for invisible unicode characters that travel in AI text, and for signed C2PA metadata attached to generated image files. The three are entirely different things and only two of them can be removed.
+ − Does Claude add watermarks to its text?
Yes. Anthropic confirmed on 11 August 2026 that supported Claude models embed an invisible machine-readable watermark in generated text, applied worldwide across the API, Claude, Claude Code, Claude Cowork and Claude Tag, with no opt-out. It was introduced to meet Article 50 of the EU AI Act.
+ − Can this tool remove Claude's text watermark?
The cleaner on this page cannot — no character cleaner can, because the watermark is a statistical bias in which words the model chose rather than a character you can delete. The separate Claude text watermark remover attacks it the only way that works, by rewriting word choice through synonyms, connectives and contractions, and reports what share of words it changed. Treat that as disruption rather than a guaranteed erase.
+ − How does this watermark remover work?
It scans your text character by character against a list of over 70 known invisible unicode code points — zero-width characters, word joiners, bidirectional marks, variation selectors and lookalike spaces. Invisible characters are deleted, space lookalikes become regular spaces, and every visible character is preserved exactly.
+ − Is my text sent to a server?
No. There is no backend and no upload. All processing runs in your browser with JavaScript — you can disconnect from the internet and the tool keeps working. Nothing is logged, stored or transmitted.
+ − Is it legal to remove AI watermarks?
Removing invisible characters from your own text is generally legal for personal use. Follow the terms of service of the AI platforms you use, and disclose AI assistance where a school, publisher or employer requires it.
+ − Do other AI tools like ChatGPT or Gemini use watermarks?
OpenAI has confirmed building a ChatGPT text watermarking system but has not shipped it. Google's SynthID covers images, audio and video, with text watermarking researched separately. This tool works on output from any model, since the invisible characters involved are the same across all of them.
Remove Claude Watermark is free and always will be. No account, no limits, no data collection.