Secret Notes
Security & EncryptionCreate ephemeral, encrypted notes that can only be read once. After the recipient opens the link, the note is destroyed. Built with client-side AES-256 encryption — the server never sees your content.
End-to-end encrypted. Notes are encrypted with AES-256-GCM in your browser. The encryption key is only in the share link — it never reaches any server. Notes self-destruct after being read.
Related Tools
Encoder / Decoder
Encode and decode Base64, URL, HTML, Unicode, and more.
Secure Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 and other cryptographic hashes.
Password Strength Meter
Analyze password strength with entropy calculation and security feedback.
Encoder / Decoder
Encode and decode Base64, URL, HTML, Unicode, and more.
Frequently Asked Questions
How does the one-time note work?
Your note is encrypted in the browser, and the decryption key is included in the URL fragment (which is never sent to any server). When the link is opened, the note is displayed and immediately deleted.
Can the note be read more than once?
No. Once the recipient opens the link, the encrypted note is deleted from storage and cannot be accessed again.
How long do notes last if not opened?
Notes expire after 24 hours if not opened.