TOTP Generator (RFC 6238)
RFC 6238 time-based OTP. Enter the base32 shared secret from your auth provider.
Digits
TOTP Generator (RFC 6238) — Free Online Tool
Generates RFC 6238 time-based one-time password (TOTP) codes from a shared secret using the Web Crypto HMAC API, with selectable SHA-1/256/512, 6 or 8 digits, and a configurable time step, plus a live countdown to the next 30-second window, useful for testing 2FA / MFA flows, verifying authenticator apps like Google Authenticator and Authy, and debugging OTP validation in authentication services.
How to use the TOTP Generator (RFC 6238)
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the TOTP Generator (RFC 6238) free to use?
Yes. The TOTP Generator (RFC 6238) is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the TOTP Generator (RFC 6238) upload my data?
No. The TOTP Generator (RFC 6238) processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the TOTP Generator (RFC 6238) work offline?
After the page loads, the TOTP Generator (RFC 6238) runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this TOTP Generator (RFC 6238)
The TOTP Generator (RFC 6238) runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.