AuthGuard - 2FA Authenticator

安全なオフラインTOTP認証アプリ。

AuthGuard is a fast, secure, and completely offline two-factor authentication (2FA) extension for Chrome. Generate TOTP codes instantly from any authenticator-compatible account — no internet connection required. 🔒 YOUR PRIVACY IS OUR PRIORITY Everything stays on your device. Your secret keys are stored locally using Chrome's sandboxed storage API and are never transmitted anywhere. There are no servers, no cloud sync, no external APIs. ⚡ KEY FEATURES Saved Accounts Add your authenticator accounts once and access them anytime. Each account displays a live 6-digit TOTP code that refreshes automatically every 30 seconds. A visual countdown ring shows how many seconds remain before the next code appears, color-coded from green to orange to red. Quick Code Mode Don't want to save anything? Paste your Base32 secret key into Quick Code mode and your one-time code appears instantly. Nothing is stored — when you close the popup, everything is gone. Save from Quick Code Generated a quick code and want to keep the account? Hit "Save Account" directly from the Quick Code tab. Custom Account Colors Assign one of 8 color labels to each account for quick visual identification. One-Click Copy Click any account card to instantly copy the current code to your clipboard. Search Filter your saved accounts by name instantly. 🌍 MULTILINGUAL — FULLY AUTOMATIC AuthGuard automatically matches your Chrome browser language. No settings needed. Supported languages: English, Turkish, German, French, Spanish, Portuguese, Italian, Russian, Chinese (Simplified), Japanese, Korean, Arabic. 🛡️ PERMISSIONS storage — Saves your account names, secret keys, and preferences locally on your device only. clipboardWrite — Copies generated codes to your clipboard when you click the copy button. The extension never reads your clipboard. ✅ STANDARD COMPATIBILITY AuthGuard works with any service that supports the TOTP standard (RFC 6238). If your service works with any standard authenticator app, it works with AuthGuard. 🔬 HOW IT WORKS TOTP (Time-based One-Time Password) is an open standard used worldwide for two-factor authentication. A 6-digit code is derived from your secret key and the current time using the browser's built-in Web Crypto API. No internet connection is needed at any point. 📖 HOW TO USE 1. Click the AuthGuard icon in your Chrome toolbar 2. Add an account: click +, enter a name and your Base32 secret key, choose a color, and save 3. Or use Quick Code: go to the Quick Code tab, paste your secret key, get your code instantly 4. Click any account card or the copy button to copy the code ❓ WHERE DO I FIND MY SECRET KEY? When enabling two-factor authentication on a website, you are shown a QR code and a text secret key (labeled "Secret Key" or "Manual Entry Key"). This Base32 text key is what you enter into AuthGuard. Example format: JBSWY3DPEHPK3PXP AuthGuard is free, offline, and built with privacy as the top priority. No data collection. No tracking. No servers. Just secure, instant 2FA codes whenever you need them. Tip: Always keep your secret keys backed up in a safe place. If you lose access to your authenticator without backup codes, you may be locked out of your accounts.