notenotfound is a free, open-source tool for sharing sensitive information safely. Write a private note, get a unique link, and share it. The moment the recipient opens the link, the note is permanently deleted from the server. The link is then dead forever — nobody can read it again, not even us.
Your note is encrypted with AES-256-GCM before it is stored. When you create a note, you receive a unique one-time URL. The recipient opens the link and sees a confirmation screen warning them the note will be destroyed when they read it. After they confirm, the note is decrypted, displayed once, and immediately deleted from the database.
AES-256-GCM encryption — the same standard used by banks and governments.
Optional password protection — recipients must enter the correct password to read the note.
Auto-expiry — notes auto-delete after 1 hour, 24 hours, 3 days, or 7 days even if never read.
Zero logs — we do not store IP addresses, access timestamps, or note contents in logs.
Open source — the full source code is available on GitHub for anyone to audit.
Sharing server passwords and database credentials with teammates.
Sending API keys and access tokens without leaving a permanent trail.
Sharing private messages that should not live forever in chat history.
Temporary access credentials for contractors and freelancers.
Sensitive client information that must not be stored in email.
Looking for a Privnote alternative or OnetimeSecret alternative? notenotfound is a free, open-source alternative with AES-256 encryption, optional password protection, configurable expiry, and a free developer API.
notenotfound provides a free REST API. Send a POST request to /api/create-note with your note content to receive a unique shareable link. Use /api/read-note to retrieve and destroy a note programmatically. No API key required.
Is notenotfound free? Yes, completely free with no sign-up required.
Is my note encrypted? Yes, with AES-256-GCM before it leaves your browser.
Can I add a password? Yes, optional password protection is available.
What happens if the note expires? It is automatically and permanently deleted.
Can I self-host notenotfound? Yes, the full source code is on GitHub.