Hidden Unicode characters silently corrupt code and waste debugging hours

Short summary

Hidden Unicode characters—particularly zero-width spaces—silently corrupt code, API keys, configs, and database values when copy-pasted from rich text sources like websites, PDFs, or chat apps. Before blaming your framework or package manager, use an online detector like TextoInvisibles to reveal these invisible characters. Check pasted content before deployment—a simple habit that saves hours of failed debugging.

• •Invisible Unicode characters break code when pasted from rich text sources (websites, PDFs, chat apps)
• •Use online detectors like TextoInvisibles to reveal hidden characters in suspicious text
• •Check copied content before deployment—faster than debugging framework or infrastructure issues

Generated with AI, which can make mistakes.