Blackbox
Zero-knowledge password, secret & autofill manager.
What it does
Blackbox is a zero-knowledge vault for everything you have to keep secret, logins, API keys, SSH and encryption keys, server credentials, and identities. Every item is encrypted on your device with Argon2id key derivation and AES-256-GCM before it ever leaves, so the sync server only ever holds ciphertext.
Your vault follows you across a fast web app, a browser extension that autofills by exact domain, and a native desktop app. Because encryption happens client-side, we never see your master password or the contents of your vault, and neither could anyone who compromised our servers.
- Argon2id + AES-256-GCM
- Domain-locked autofill
- Web · Extension · Desktop
See it in action
A look at Blackbox. Click any screen to enlarge.
Built for the job
Zero-knowledge by design
Argon2id + AES-256-GCM on your device. The server stores ciphertext only, your master password never leaves your machine.
Every kind of secret
Logins, API keys, SSH/encryption keys, server credentials, secure notes, and identities, one vault, one search.
Phishing-resistant autofill
The extension matches credentials by exact domain, so lookalike sites get nothing.
Sync everywhere
Web app, browser extension, and desktop stay in lock-step over encrypted sync.
Blackbox: Zero-knowledge password, secret & autofill manager.
Tell us what you’re trying to build and we’ll get you set up, or point you to the right download.