I built a client-side tool that detects and removes 30+ types of invisible Unicode characters (zero-width spaces, joiners, em dashes) that AI systems like ChatGPT may use for watermarking text.

• 100% client-side - your text never leaves your browser • Detects zero-width spaces (U+200B), joiners (U+200D), and other invisible markers • Real-time detection with character visualization • No registration, no tracking, completely free • Multi-language support (EN/DE/ES)

Built with vanilla JavaScript, no frameworks. All processing happens locally for privacy.