Share a secret once, safely

What CryptoPaste does

CryptoPaste helps you send a secret (like a password or API key) **once**. Share the generated link; the recipient can reveal the secret a single time.

How it works

  1. Your browser encrypts the secret with strong AES-GCM 256-bit encryption (Web Crypto API) before upload.
  2. The server stores only the ciphertext, not the key.
  3. The share link contains the key and IV in the URL fragment, so the server never sees them.
  4. When opened, the UI is designed for one-time reveal. If the secret text is missing or already viewed, you’ll see “Secret text not found”.