Authium

About

Authium is a secure local TOTP / 2FA authenticator for Chrome. Generate time-based one-time passwords offline, store secrets in an encrypted vault on your device, and sign in faster on the sites you use every day.

CORE FEATURES (FREE)
• Generate 6–8 digit TOTP codes — works fully offline
• Encrypted vault with master password or device key unlock
• Add accounts manually or by scanning a QR code
• Copy codes with one click
• Countdown timer shows when each code refreshes
• Multiple accounts with tags and search
• Light and dark themes

PREMIUM FEATURES (Authium Pro / Team)
• Login Copilot — floating OTP chip on login and 2FA pages while your vault is unlocked
• OTP autofill on the current tab (optional, user-granted permission only)
• Scan QR codes directly from any browser tab
• Smart account suggestions based on the site you’re on
• Command palette for quick actions
• Optional encrypted cloud sync via Authium account
• Team Vault for shared organization accounts (Team plan)

SECURITY & PRIVACY
• Secrets are encrypted locally before storage — Authium never sees your TOTP seeds in plaintext
• Core authentication works without an account and without internet
• Optional site access is requested only when you enable autofill or Login Copilot — never in the background without your consent
• No browsing history is collected or sold
• Tab URL/title is used locally only for smart suggestions while the popup is open
• Premium sign-in uses Google OAuth via Supabase; optional cloud sync stores only encrypted vault data
• Enterprise administrators can enforce policies via managed storage (Chrome/Edge)

HOW LOGIN COPILOT WORKS
When Premium is enabled and your vault is unlocked, Authium can show a small floating chip on login and two-factor pages with your matching OTP code and a Fill button. You stay in control — dismiss the chip anytime, and site access can be revoked in Settings.

PERMISSIONS EXPLAINED
• Storage — save your encrypted vault and settings locally
• Identity — sign in to Authium Premium with Google
• Supabase hosts — account login and optional encrypted sync only
• Optional scripting / tab access — only if you enable autofill or Login Copilot

Authium is built for people who want a fast, private authenticator inside the browser — without sending their secrets to the cloud unless they choose to.

Privacy policy: https://www.authium.app/privacy
Terms: https://www.authium.app/terms
Support: [email protected]