PGP Online - Encrypt, Decrypt & Manage Keys in Your Browser
Kleopatra Neo is a free PGP suite that runs entirely in your browser. Encrypt messages, decrypt PGP blocks, generate key pairs, and verify signatures - without installing anything or creating an account.
PGP (Pretty Good Privacy) encryption is the global standard for secure digital communication. It's used by journalists protecting sources, developers signing code releases, businesses exchanging confidential contracts, and individuals who value their privacy.
Most PGP tools require installation - GPG, Kleopatra (Gpg4win), GPG Suite. Kleopatra.app changes this by bringing the full OpenPGP workflow to the browser. Under the hood it uses the OpenPGP.js library - the same library trusted by ProtonMail - to perform all cryptographic operations locally.
The tool is fully featured: generate RSA 4096-bit key pairs, import existing keys from .asc files, encrypt messages to any public key, decrypt messages with your private key, sign messages to prove authorship, and verify signatures from others.
Everything is persistent in your browser's localStorage - so your keys are available next session without needing to re-import. And because there's no backend, there's nothing to hack on the server side. Your private key never leaves your machine.
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
What is the best free PGP tool online?
Kleopatra.app is a free, browser-based PGP suite. It supports key generation, encryption, decryption, signing, and verification - all without installation.
Is it safe to use an online PGP tool?
It depends on the tool. Kleopatra Neo (kleopatra.app) is designed so cryptographic operations happen in your browser using the open-source OpenPGP.js library; the local workflows do not require uploading your keys or messages to our servers.
Does the online PGP tool work without an internet connection?
Once the page is loaded, all cryptographic operations work offline. You only need internet to initially load the app.
Can I use PGP online for email encryption?
Yes. Encrypt your message with the recipient's public key, then send the resulting PGP block via email. The recipient decrypts it with their private key.