display=swap" rel="stylesheet"> LocalBox2FA – AnnMax

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LocalBox2FA

Generate TOTP 2FA verification codes — entirely locally, with zero data upload.

✅ Free CoreChromium · Manifest V3 · Fully Offline

🆓 Free Features

TOTP code generation (RFC 6238 compatible)
Works with Google Authenticator, Authy, all standard TOTP services
30s countdown with color transitions (blue→orange→red)
One-click copy to clipboard
Save & manage secret keys with custom names
Live history — all accounts show real-time codes
Export all secrets as text file (backup)
Safe delete with confirmation dialog
Duplicate guard — prevents saving same key twice
Dark mode — follows system preference
6-language UI (EN/ZH/JA/ES/DE/FR)
Under 50KB, zero permissions declared

⭐ Premium Extra

No premium features — all features are free

Installation

Open chrome://extensions/
Enable Developer mode
Click Load unpacked → select the local-box2-fa folder
Click the 🔐 icon in your toolbar

Security Notes

🔑 Plaintext storage — Secret keys stored in localStorage without encryption
💾 Clearing data = data loss — Export backup before clearing browser data
📄 Export is unencrypted — Store backup file securely
🛡️ Best practice — Transfer to dedicated authenticator app for production use

Privacy

✅ Zero data upload — all TOTP computation happens locally
✅ No analytics, no cookies, no network requests
✅ Zero permissions declared in manifest
✅ Secrets in localStorage, never leave your device

Download Free Source Code

For questions: support@annmax.eu.org

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