TOTP Authenticator - 2FA OTP Code Generator

Secure and fast TOTP authenticator for 2FA login. Generate OTP codes offline and manage multiple accounts easily.

TOTP Generator — Secure 2FA OTP Authenticator A lightweight, offline‑first browser extension for generating Time‑based One‑Time Passwords (TOTP). Built for websites and apps that support Two‑Factor Authentication (2FA), it delivers a simple, fast, and reliable way to protect your accounts—right inside your browser. Key Features - Generate TOTP codes that follow RFC 6238, with a live 30‑second countdown - Add accounts via QR image upload, image paste, otpauth:// URI paste, or image drag‑and‑drop - One‑click Auto‑Fill into web pages; auto‑copy as a fallback when fill isn’t supported - Manage multiple accounts with duplicate detection, quick delete, and clean UI - Optional cross‑device sync via your browser (Chrome) account; automatic local fallback - Import/Export JSON for backup and migration; duplicates are skipped on import Privacy & Security - Works offline with no third‑party network requests; all processing happens locally - Secrets are stored in browser storage; when Chrome Sync is enabled, they can sync across devices - For stronger privacy, enable Chrome’s Sync encryption passphrase (end‑to‑end encryption) - Exports contain plaintext secrets—store backups securely Why Choose TOTP Generator - A reliable 2FA authenticator that runs directly in your browser—no phone required - Lightweight, fast, and easy for both beginners and power users - Polished interface (shadcn/ui + Radix) with multilingual support (English/Chinese) - Ideal for personal and team security workflows Use Cases - Protect logins for Google, GitHub, Microsoft, AWS, Dropbox, and more - Add an extra layer of security with 2FA, or complement existing MFA setups - Replace or augment mobile authenticator apps for browser‑centric workflows Sync & Backup Notes - Cross‑device sync uses chrome.storage.sync; sign in to the same Chrome account and install the same store version of the extension (same ID) to sync - If Sync is off or unavailable, data remains local to the device - Chrome Sync has quotas (~8 KB per key, ~10 MB total); first sync may take time - Unpacked developer builds use a different extension ID and won’t share data with the store version With TOTP Generator, you can strengthen account security, streamline logins, and enjoy a convenient authenticator experience—secure, fast, and privacy‑friendly inside your browser.