Spassword is a zero-knowledge password manager for Chrome & Edge. Argon2id + AES-256-GCM happens on-device — servers only see ciphertext, not even we can read your vault. Autofill, strong password generator, 2FA (TOTP) codes, passkeys — plus one-click breach checks and CSV import from Chrome/Google. Free multi-device sync, offline support, and a web vault at spassword.net, no install needed. Share logins with up to 5 family members, view/edit permissions, real key rotation on revoke. 100% free