Free Online PGP Encryption Tool
Encrypt and decrypt messages with OpenPGP directly in your browser. No installation, no accounts, no data sent to any server.
Free & open source. MIT / Apache-2.0 license. No telemetry.
What is PGP Encryption?
PGP (Pretty Good Privacy) is the gold standard for encrypting messages, emails, and files. It uses public-key cryptography — you share a public key that anyone can use to encrypt messages to you, while only your private key can decrypt them.
Created in 1991, PGP is trusted by journalists, security researchers, activists, and millions of users worldwide. The OpenPGP standard (RFC 4880) ensures interoperability between different PGP implementations.
KeychainPGP makes PGP accessible to everyone through a modern interface and a clipboard-first workflow — no command line, no configuration, no complexity.
How to Encrypt a Message with PGP Online
Open the online PGP tool
Navigate to the KeychainPGP web app. It loads entirely in your browser — no installation or account required. Everything runs locally via WebAssembly.
Generate or import a PGP key
Create a new Ed25519 + X25519 key pair (the most modern and secure option), or import an existing PGP key in ASCII-armored format.
Import the recipient's public key
Add your contact's public key by pasting their key block into the Keys tab. This is the key you'll encrypt messages to.
Enter your message
Switch to the Encrypt tab and type or paste the message you want to protect.
Select recipient and encrypt
Choose the recipient from your key list and click "Encrypt to Clipboard". The PGP-encrypted message is instantly copied.
Send the encrypted message
Paste the encrypted message into any email, chat, or messaging app. Only the intended recipient can decrypt it with their private key.
Frequently Asked Questions
Is it safe to encrypt PGP messages online?
Yes, when using KeychainPGP's web app. All encryption and decryption happens locally in your browser using WebAssembly compiled from Rust. No data is ever sent to a server.
What is PGP encryption used for?
PGP encryption is used to protect private messages, emails, files, and digital signatures. It uses public-key cryptography — you encrypt with someone's public key, and only their private key can decrypt it.
How does PGP encryption work?
PGP generates a random session key, encrypts your message with a fast symmetric cipher, then encrypts the session key with the recipient's public key. The recipient uses their private key to decrypt the session key, then decrypts the message.
What is the difference between PGP and GPG?
PGP is the original encryption standard by Phil Zimmermann (1991). GPG (GnuPG) is a free, open-source implementation. OpenPGP is the IETF standard (RFC 4880). KeychainPGP implements OpenPGP using the Sequoia-PGP library in Rust.
Can I use PGP without installing software?
Yes. KeychainPGP offers a web-based PGP tool that runs entirely in your browser. You can generate keys, encrypt and decrypt messages without installing anything.
What encryption algorithm does KeychainPGP use?
KeychainPGP uses Ed25519 for signatures and X25519 for key agreement — modern elliptic curve algorithms providing equivalent security to RSA-3072 at a fraction of the key size, powered by Sequoia-PGP.
Is PGP encryption still secure in 2026?
Yes. PGP with modern algorithms like Ed25519/X25519 remains one of the strongest encryption standards. Its security depends on proper key management and up-to-date implementations.
How do I share my PGP public key?
Export your public key in ASCII-armored format and send it via email, chat, or publish it on your website. In KeychainPGP, go to the Keys tab and use the export function.
What is clipboard-based PGP encryption?
A workflow where you copy text, encrypt or decrypt with a hotkey, and paste the result. Works with any app. KeychainPGP uses Ctrl+Shift+E to encrypt and Ctrl+Shift+D to decrypt.
Is KeychainPGP really free and open source?
Yes. 100% free and open source under MIT/Apache-2.0 license. No paid tiers, no accounts, no telemetry. Funded by voluntary cryptocurrency donations.
Learn More About PGP Encryption
What is PGP?
A complete guide to Pretty Good Privacy, public-key cryptography, and digital signatures.
How to Use PGP
Step-by-step tutorial for generating keys, encrypting messages, and verifying signatures.
PGP vs GPG
Understand the difference between PGP, GPG (GnuPG), and the OpenPGP standard.
PGP for Beginners
Everything you need to know about PGP encryption, explained in simple terms.
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