Claude Watermark

Meet Claude Watermark

Claude Watermark is an independent text checker and cleanup tool focused on artifacts that can accompany copied AI output. Paste a passage to inspect hidden HTML classes, invisible Unicode characters, unusual spaces, and punctuation patterns. The checker reports counts and positions in the browser without requiring an account or uploading the text.

Paid cleaning and rewriting features help remove formatting traces and vary phrasing, with the rewrite step sending the passage to a model provider. The site also explains how pasted content behaves in common editors and publishing tools. Its deterministic checks concern the actual text and markup; they cannot publicly verify a statistical watermark or establish that an author used AI.