Mydentify AI Watermark and Claude Checker
AI Watermark Detector
Free
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A free browser-based checker for observable Unicode artifacts in Claude, ChatGPT, and other AI text, with clear limits on what text-only evidence can prove.
Quick scan of what stands out
Detects zero-width characters, directional controls, non-standard spaces, and control characters
Runs in the browser without uploading pasted text
Explains limits around Claude's private statistical watermark and authorship claims
Where this tool fits best
Inspect pasted text for observable Unicode artifacts before publishing
Debug text copied from Claude, ChatGPT, or other AI tools
Teach teams why AI detection signals need cautious interpretation
Completely free with no cost