Zero Width Space
U+200BZero-width or format character
Hidden message field tester
Make a hidden-looking Unicode sample for message-field compatibility tests, preview checks, and harmless formatting experiments.
U+200BZero-width or format character
U+200CZero-width or format character
U+200DZero-width or format character
Invisible text for hidden message creates a hidden-looking Unicode text effect for harmless formatting experiments and compatibility testing. It is not private messaging, encryption, or a way to hide sensitive content.
Hidden message style output may be stripped, normalized, rejected, or displayed differently by different apps. Some fields require visible text and will reject invisible-only samples.
Instead of promising hidden messages, this page explains detection, field behavior, Test Box verification, and safer alternatives when the target app removes invisible Unicode.
Use hidden message style text for harmless formatting experiments and Unicode testing. Do not use it for private data, deception, evasion, harassment, impersonation, or harmful communication.
Compare invisible ink text, the invisible ink generator, secret text, invisible message text, and invisible chat text.