OTP Dynamic Password Generator
Online OTP dynamic password generator supporting TOTP/HOTP, Base32 secret generation, otpauth URI and QR provisioning for 2FA setup, authenticator integration, and secure login verification.
Secret Configuration
Dynamic OTP
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Enter or generate a secret to show one-time password
OTP Guide
OTP (One-Time Password) changes every use and is widely used in 2FA login flows to reduce risk from static password leaks.
This tool supports both TOTP and HOTP. All calculations run locally in your browser without uploading secrets or generated codes.
TOTP vs HOTP
- TOTP updates automatically by time window and is the most compatible option.
- HOTP increments by counter and works well for offline or manual workflows.
- Both methods use the same shared secret and hash function to output fixed-length numeric codes.
How to Use
- Generate a new secret or paste the Base32 secret from your service.
- Set digits, algorithm, issuer, and choose TOTP or HOTP mode.
- Scan the QR code with an authenticator app or import the otpauth URI manually.
- Use the current one-time code when logging in.
Security Tips
- Treat the secret as a credential and never expose it publicly.
- Use different secrets for different platforms to limit blast radius.
- Store recovery codes and keep a secure backup of authenticator setup.
- Do not share screenshots or recordings containing secret QR codes.
Privacy & Compatibility
The tool uses native Web Crypto API for HMAC and random secret generation. QR rendering is done with local script assets and no external network dependency.