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🫥 Zero-Width Steganography

Hide secret messages in visible text using zero-width Unicode characters with encode, decode, and detect modes plus visual character map

🔒 All processing runs locally in your browser — input data is not uploaded by the tool. This tool uses a Gmail-safe character set (U+200C / U+200D / U+2060 / U+FEFF), avoiding U+200B which Gmail strips. Note: some platforms (Twitter/X, WeChat) may strip zero-width characters.

Mode

Encoding Info

Free online zero-width steganography tool — hide secret messages inside visible text using zero-width Unicode characters (ZWNJ, ZWJ, Word Joiner, ZWNBS). Three modes: Encode (embed secret into carrier text), Decode (extract hidden message), and Detect (scan any text for zero-width characters with visual position map and type breakdown). Uses a Gmail-safe character set (avoids U+200B), supports emoji and CJK via codePointAt + Intl.Segmenter. Live capacity indicator and platform compatibility tips. Client-side processing; no data ever leaves your browser.