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OTP / TOTP Generator
Generate one-time passwords and verify TOTP tokens using RFC 6238. Test 2FA secrets, simulate authenticator apps, and verify codes in real time.
✓ Free · No Upload Client-Side Only RFC 6238 · HMAC-SHA1 Live Countdown
🔐 TOTP
TOTP · 6 digits · 30s
✓ Copied!
🔒 All OTP computation happens entirely in your browser — your secret key never leaves your device.
Ready Configure your secret and click Generate
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click to copy
Valid for 30s Next code in