Encrypt Messages with PGP Online - Free & Private
PGP (Pretty Good Privacy) encryption lets you send messages that only the intended recipient can read. With Kleopatra Neo's browser-based tool, you can encrypt any message using a PGP public key - right in your browser, client-side.
To encrypt a message with PGP, you need the recipient's public key. Once you have it, only the person holding the matching private key can decrypt your message. This is the foundation of asymmetric encryption - and it's the same standard used by journalists, security researchers, and privacy advocates worldwide.
Kleopatra Neo's online PGP encryption tool is designed to run in your browser using the open-source OpenPGP.js library. For this local workflow, your public keys, messages and encrypted output are processed client-side and do not need to be uploaded to Kleopatra Neo servers.
Unlike Gpg4win's desktop Kleopatra application, this web tool works on any operating system - including macOS and Linux - without any installation required. It supports RSA 4096-bit encryption, the gold standard for secure key lengths.
To get started: import the recipient's public key, compose your message, and click Encrypt. The output is an armored PGP block you can safely send over email, messaging apps, or any channel. The encrypted text is unreadable without the corresponding private key and its passphrase.
Privacy by design
For local OpenPGP workflows, supported cryptographic operations are performed client-side using the open-source OpenPGP.js library. Plaintext content and private key material used for these local operations do not need to be uploaded to Kleopatra Neo servers. Optional Online Sync is separate: when enabled, supported vault data is encrypted client-side before encrypted vault data is uploaded for synchronization.
Frequently Asked Questions
Can I encrypt a message for someone online without installing software?
Yes. Kleopatra Neo's browser-based PGP tool lets you encrypt messages using a public key without installing anything, client-side in your browser.
Is my message stored when I encrypt it online?
No. Kleopatra Neo performs encryption locally in your browser; the local workflow does not require sending your message to our servers.
What key types does the online PGP encrypt tool support?
Kleopatra Neo supports OpenPGP-compatible keys including RSA 4096-bit. You can import any standard .asc or .pgp public key file.
Can the recipient decrypt my message without Kleopatra Neo?
Yes. The output is standard OpenPGP armored format. It can be decrypted using any compatible tool - Gpg4win's Kleopatra, the GPG command line, ProtonMail, or other OpenPGP software.