Hidden Character Detector
Detect invisible, zero-width, and RTL override characters in text
What are hidden characters?
Hidden characters are Unicode characters that are invisible or zero-width, such as Zero Width Space (U+200B), Non-Breaking Space (U+00A0), and RTL Override (U+202E).
Why should I check for hidden characters?
Hidden characters can be used for security attacks like RTL override spoofing, or cause unexpected behavior in code, URLs, and data processing.
What are RTL override characters?
RTL (Right-to-Left) Override characters can reverse text direction, making "exe.txt" appear as "txt.exe" — a common phishing technique.
Is my data sent to any server?
No. All processing happens locally in your browser. Your text never leaves your device.