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ChatGPT Watermark cleans hidden Unicode characters, rewrites sentences, detects AI text, and checks plagiarism.
ChatGPT Watermark provides a free workspace for cleaning copied text and reviewing drafts. Users paste text to identify hidden Unicode characters, including zero-width spaces and unusual spacing marks. The character cleanup runs in the browser. The website also offers sentence rewriting, an AI detector, and a plagiarism checker. Users can copy or download their results. The tool distinguishes invisible character cleanup from statistical watermark detection, which requires a matching detection key. It supports writers and editors who want to inspect text before using it in documents or publishing workflows.
