TOTP / 2FA Code Generator
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Privacy First: Your files are processed securely. Whenever possible, processing happens in your browser and files are never stored on our servers.
A browser-based TOTP (Time-Based One-Time Password) generator built on RFC 6238, using the Web Crypto API for secure HMAC computation. Add multiple accounts - each with a name, issuer, Base32 secret, algorithm (SHA-1, SHA-256, SHA-512), digit count (6 or 8), and period (30s or 60s). Each account shows the live TOTP code with a color-coded countdown bar and the next code. Generate a cryptographically random Base32 secret instantly. Scan the QR code with Google Authenticator, Authy, or any TOTP app to add the account. Copy the current code or the full otpauth:// URI. Accounts are saved in browser localStorage. All code generation is 100% client-side - secrets never leave your browser.
How to Use
- 1Click 'Add' to create your first account - a random secret is pre-generated
- 2Enter the account name (e.g. GitHub) and issuer (e.g. GitHub Inc.)
- 3Scan the QR code with Google Authenticator, Authy, or any TOTP app
- 4The 6-digit code with countdown bar appears immediately in the accounts list
- 5Click the Copy icon next to any account to copy the current code to clipboard
- 6Click an account card to edit its settings - change algorithm, digit count, or period
Features
- Unlimited accounts stored in browser localStorage
- Per-account: name, issuer, Base32 secret, algorithm (SHA-1/SHA-256/SHA-512), digit count (6 or 8), period (30s or 60s)
- Live TOTP code with 3+3 or 4+4 space-formatted display
- Color-coded countdown bar: green → yellow → red as time expires
- Next code preview so you can see what's coming
- Generate cryptographically random Base32 secret with one click
- Show/hide secret toggle for security
- QR code for otpauth:// URI (scan with any TOTP authenticator app)
- Copy current code or copy full otpauth:// URI
- 100% browser-side - secrets never transmitted anywhere
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