Zwisper
Hide a message in text
A practical walkthrough for adding an encrypted private note to ordinary cover text, sharing it, and checking that it survived.
Read the guide →Private notes, visible words, honest expectations.
Learn how hidden text works, how to recognise invisible characters, and where encryption helps. These guides are written for everyday messages—not for bypassing rules or hiding activity from people who need to see it.
Start with the question you have
Reveal and understand invisible text
What zero-width characters are, why they appear in normal text, and how to distinguish a hidden note from harmless formatting.
Understand invisible text →Steganography vs. encryption
Two different jobs: one changes how a note is carried; the other protects the note’s contents. See what each does and does not promise.
Compare the two →Use the right tool for the message
Zwisper places a private note inside a message you already intend to send. The visible words remain readable, while the private part is encrypted on your device. It is useful when a short detail belongs alongside an ordinary message, such as a handover code, a meeting note, or a personal aside for someone you trust.
That does not make the message invisible to the service carrying it. Some editors remove the characters a note uses, and a service or person examining text may notice that invisible characters are present. A screenshot also does not preserve a hidden note. The guides explain these limits so you can decide when this format fits.