Claude Watermark
The free Claude watermark checker. Hidden HTML, invisible characters, non-breaking spaces, the em dashes people flag on sight. All of it surfaced instantly, stripped in one click, and rewritten so the passage reads like you wrote it.
Claude Watermark
The free Claude watermark checker. Hidden HTML, invisible characters, non-breaking spaces, the em dashes people flag on sight. All of it surfaced instantly, stripped in one click, and rewritten so the passage reads like you wrote it.
Ranked #5485 on TrustMRR
No active subscriptions
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Paddle API key.Last updated: Aug 29, 2026, 12:38 PM
The free Claude watermark checker. Hidden HTML, invisible characters, non-breaking spaces, the em dashes people flag on sight. All of it surfaced instantly, stripped in one click, and rewritten so the passage reads like you wrote it.
Copying out of a chat interface carries HTML with it. Claude’s paragraphs arrive wrapped in class names containing 'claude', which land in whatever you paste into. This is what the AO3 detector catches, and it is the reason people get flagged, not their writing style.
Audience
Users concerned with AI-generated text being flagged
Pricing
Free and unlimited, no account
Team size
1 person
Funding
Bootstrapped
Domain Rating
claudewatermark.xyz
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