Secrets that vanish.
Encrypted in your browser. Unreadable by us. Destroyed after reading.
Wispr is free & open-source
No ads, no tracking, no VC money — powered by people who care about privacy.
How it works
A three-step zero-knowledge pipeline. No plaintext ever leaves your device.
Local Encryption
AES-256-GCM encrypts your message entirely in your browser. We receive only scrambled ciphertext — mathematically impossible to reverse without the key.
Secure Link
The 256-bit key is embedded in the URL fragment after the #. Fragments are never sent to servers by the HTTP spec — we never see it.
One-Time Reveal
The recipient's browser decrypts locally. The moment they reveal it, the row is hard-deleted. The link becomes permanently dead.
AES-256-GCM
Encryption standard
Zero-Knowledge
Server sees nothing
Burn-After-Read
Auto-destroyed
No Accounts
Fully anonymous