Code Generator
Current Code
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2FA / MFA / TOTP
2FA Online
Generate secure TOTP codes instantly, store keys in an encrypted local vault, and manage multiple 2FA accounts from one clear interface.
Saved Accounts
No saved accounts yet. Add a key to start.
FAQ
What is an authenticator online tool?
It is a browser-based utility that generates time-based one-time passwords from a secret key you already own.
Does this tool send my 2FA secret to your servers?
No. The secret is processed locally in your browser with Web Crypto and is not transmitted or stored by Temp Mail Lab.
What input formats are supported?
You can paste a standard Base32 secret key or a full otpauth:// URI used by authenticator apps.
Why might the code not match another authenticator app?
Mismatches usually come from the wrong secret, wrong digits or period, unsupported algorithm settings, or device clock drift.
Is this the same as SMS OTP?
No. SMS OTP is delivered by text message, while TOTP codes are generated locally from a shared secret and device time.
Can I use this with Google, Microsoft, GitHub, or similar services?
Yes, if the service uses a standard TOTP secret or otpauth:// URI and you are using your own account credentials.
