Hide secret text in zero-width characters
Zero-width characters are invisible Unicode characters. This tool encodes your secret message into binary using 4 types of zero-width characters embedded in normal text — the visible text looks completely normal, but copy-paste carries the hidden content. Use cases: document anti-piracy watermarks, copyright marks, steganography. Note: some platforms (e.g. WeChat) strip zero-width characters; best used in web pages, emails, or code comments.
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