Go Postbox

Share a secret that can be read exactly once.

The note is encrypted in your browser with AES-256-GCM before it leaves this page. The decryption key lives in the link fragment (after #) and is never sent to the server. The note is destroyed on first read, or when it expires.

JavaScript is required. Notes are encrypted and decrypted in your browser so the server never sees the message or the key. Without JavaScript that guarantee cannot hold, so the buttons on this page stay disabled.

Write a note

Your one-time link

Anyone with this link can read the note once. The key after # never reaches the server, so this link is the only copy — if it is lost, the note is unrecoverable.