Privnote
privnote.com
Creates a one-time link containing a private note that permanently self-destructs after being read once — no account required. Optionally set a passphrase, expiry time, or receive an email notification when the note is read.
Why it is useful
The simplest way to send a password, API key, or sensitive piece of text that you want to guarantee is seen only once. Once the recipient opens the link, the note is gone — no copy sits in an inbox or chat history. Useful for sharing credentials during onboarding, sending one-time codes, or any message you need to exist briefly and then disappear.