Overview

OpenKey is a self-hosted, end-to-end encrypted password manager. Clients encrypt vault data before it leaves the device. The optional sync server stores ciphertext only — master passwords and plaintext vault keys never leave the client.

What you get

• Local encrypted vault (collections, logins, cards, crypto wallets, developer secrets)
• Optional sync across devices through your own server or Nearby LAN pairing (Pro)
• Browser extension with autofill, fill shortcut, and passkeys
• Mobile / desktop app and developer CLI
• Organizations, shared collections, and item shares — still ciphertext on the server

Zero-knowledge model

1. The client derives keys from your master password with Argon2id.
2. An auth_hash authenticates you to the server without revealing the master password.
3. Vault contents stay encrypted with a vault key that the server never sees in plaintext.
4. Names, payloads, attachments, org names, and share payloads are opaque ciphertext at rest on the server.

Open packages

Package	Role
openkey_server	FastAPI zero-knowledge sync API + PostgreSQL
openkey_extension	MV3 browser extension (Chrome / Firefox)
openkey_cli	Developer CLI (secrets, password gen, sync)

The mobile and desktop OpenKey app is covered separately. See Download, Using the app, Nearby, Browser extension, Packages, Server setup, FAQ, Changelog, and Quick start.