TOTP Generator
TOTP Generator
Generate Time-based One-Time Passwords (RFC 6238) from a Base32 secret key; shows current, previous, and next codes with a QR code and countdown timer; supports SHA-1, SHA-256, SHA-512 algorithms.
secret query parameterEnter a Base32 secret key to generate codes
About TOTP
TOTP (Time-based One-Time Password) is an algorithm standardised in RFC 6238. It generates a short-lived code by computing HMAC of the current time window using a shared secret.
TOTP Generator
Generate Time-based One-Time Passwords (RFC 6238) from a Base32 secret key; shows current, previous, and next codes with a QR code and countdown timer; supports SHA-1, SHA-256, SHA-512 algorithms.
Common uses
- Generate a TOTP code from a Base32 secret
- Set up a QR code for an authenticator app
- Create a new TOTP secret for user onboarding
- Generate an HOTP code for a hardware token
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Frequently asked questions
How do I generate a 2FA code from a secret key?
Enter the Base32 secret in the Generate Code tab to see the current, previous and next codes with a countdown. SHA-1, SHA-256 and SHA-512 are supported.
How do I create a new TOTP secret and QR code?
The Secret Generator tab creates a Base32 secret, and the tool shows a QR code you can scan in an authenticator app.
Can I generate counter-based HOTP codes?
Yes, the HOTP tab generates counter-based one-time passwords (RFC 4226).
Should I use this instead of my authenticator app?
It is best for testing and development. Entering real account secrets into any web page carries risk.
Is my data uploaded to a server?
No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.