Write Markdown or import a text file, then create a QR code. The full note travels inside the link. There is no saved copy on a server.
Turn on password protection to encrypt the note and its file name. Send the password separately; someone needs both the link and the password to read it.
A note must fit inside one QR code. The size indicator checks the complete link; a long note can still fit when it compresses well.
The viewer needs an internet connection to load. It then opens the note in your browser. You can download the recovered source file.
QR rendering by qrsart ↗