Claude Watermark
Claude Watermark is a comprehensive tool for detecting and removing invisible artifacts left behind when copying text from Claude's chat interface.
Our verdict
Who it's for
Detect and remove Claude's invisible text artifacts
Who should look elsewhere
Rewrite engine to remove statistical watermark is a paid feature
Pros
- +Free, unlimited checking and cleaning with no account needed
- +Your text never leaves your browser for detection and cleaning
- +Transparent about limitations, states it cannot detect Anthropic's statistical watermark and shows the source code
Cons
- −Rewrite engine to remove statistical watermark is a paid feature
- −Cannot detect or remove Anthropic's internal word-choice watermark because the key has not been released
Key features
- ✓Detects Claude-specific HTML class names in copied text
- ✓Identifies zero-width spaces, joiners, byte-order marks, and non-breaking spaces
- ✓Counts stylistic signals like em dashes and curly quotes with contextual context
- ✓Cleans all found artifacts in one click
- ✓Rewrite engine restructures and rephrases text through a different model to defeat statistical watermarks
- ✓Open-source detection engine for verifiability
- ✓Runs entirely in-browser with no account required for checking and cleaning
- ✓Rewrites use two passes: one for restructuring, one for repairing meaning and citations
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Starter | $9 | month | Humanize up to 100,000 words; 200 credits added monthly; Save 44% vs one-time |
| Pro | $19 | month | Humanize up to 300,000 words; 600 credits added monthly; Save 45% vs one-time |
| Max | $49 | month | Humanize up to 1,000,000 words; 2,000 credits added monthly; Save 53% vs one-time |