Two-Factor Authenticator

Generate TOTP codes instantly. 100% client-side — your secrets never leave your browser.

SECRET KEY
VERIFICATION CODE
30
All processing happens locally in your browser. No data is transmitted.

Frequently Asked Questions

What is 2FA?

Two-Factor Authentication (2FA) adds an extra layer of security by requiring a time-based code in addition to your password. This code changes every 30 seconds.

Is this tool safe?

Yes. All TOTP code generation happens entirely in your browser using JavaScript. Your secret keys are never sent to any server — everything is 100% client-side.

How do I use it?

Paste your Base32 secret key into the input field and click "Generate Codes". You can enter multiple keys, one per line, to generate codes for multiple accounts at once.

What format are the keys?

Secret keys should be in Base32 format (letters A-Z and digits 2-7). Spaces are automatically stripped. Example: JBSWY3DPEHPK3PXP