What is a PGP public key?

A PGP public key is a block of armored ASCII text (starts with "-----BEGIN PGP PUBLIC KEY BLOCK-----") that you can share freely. Anyone can use it to encrypt a message that only the owner of the matching private key can decrypt.

Can I encrypt to multiple recipients?

Yes — paste several public keys separated by blank lines. The same ciphertext will be decryptable by anyone holding any of the corresponding private keys.

Does PGP Tool send my message anywhere?

No. The page never makes a network request during encryption. Everything runs client-side in your browser via OpenPGP.js. You can verify this by enabling air-gap mode, which blocks every outbound request.

What is the difference between encrypt and sign?

Encrypt protects content so only the recipient can read it. Sign cryptographically proves you authored the content but does not hide it. You can do both together — sign-then-encrypt — to get authenticity and confidentiality at the same time.

How big can my message be?

There is no hard limit, but very large texts will be slow to render. For binary files of any size, use File Encrypt or Batch Encrypt instead.

Verschlüsseln

Verschlüssele Nachrichten mit einem öffentlichen PGP-Schlüssel. Clientseitig, privat, Open Source.

Alles läuft in Ihrem Browser — kein Server, kein Tracking.