Since August 2, 2026, every word Claude writes contains an invisible statistical watermark. We help you understand, detect, and remove it.
Paste any text to detect whether it contains Claude's invisible statistical watermark. Instant, free results.
Strip Claude's watermark from your text while preserving meaning. Uses intelligent rewriting to break the token pattern.
Technical deep-dive into how Claude embeds watermarks at the token level and how C2PA metadata tags files.
Anthropic's Claude AI now embeds an invisible watermark in all generated text. The watermark is a statistical pattern woven into word choices at the token level — completely invisible to human readers but detectable by specialized algorithms.
The watermark was introduced on August 2, 2026, initially for EU compliance with AI transparency regulations. It applies to all text generated by supported Claude models and survives copy-paste, unlike image metadata which can be stripped by format conversion.
In addition to the text watermark, Claude also signs generated files (images, PDFs, etc.) with C2PA content credentials — an open standard for digital provenance metadata.
Many legitimate use cases exist for removing AI watermarks: content creators who use Claude as a writing assistant and want to publish under their own name, businesses that use Claude for drafting but need clean output, researchers studying watermark robustness, and anyone who values privacy in their creative process.
Removing a watermark from content you own is legal. The watermark is a statistical artifact, not a copyright mechanism.
Claude's text watermark is embedded in token selection probabilities. To remove it, the text must be rewritten by a non-Claude model, disrupting approximately 70% of the original token sequences. Our tools intelligently rewrite your text while preserving the original meaning, tone, and structure.
For images and files, removal is simpler: converting the file format or re-saving strips the C2PA metadata header.