WISPR
ZERO-KNOWLEDGE ENCRYPTION

Secrets that vanish.

Encrypted in your browser. Unreadable by us. Destroyed after reading.

SECURITY

If set, key is excluded from the URL.

LIFECYCLE

Delete on first open

/s/

Letters, numbers, and hyphens · 3–32 characters · leave blank to auto-generate

How it works

A three-step zero-knowledge pipeline. No plaintext ever leaves your device.

01

Local Encryption

AES-256-GCM encrypts your message entirely in your browser. We receive only scrambled ciphertext — mathematically impossible to reverse without the key.

02

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.

03

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