Generate secure one-time passwords instantly — custom length, character type, and batch generation
Click "Generate OTP" to create passwords
One-Time Passwords (OTP) are single-use codes used for two-factor authentication (2FA) and transaction verification. Each code is generated using cryptographically secure random values.
Security Tips:
What is an OTP?
A One-Time Password is a temporary code used for authentication. It expires after a set time or single use.
Numeric vs Alphanumeric?
Numeric OTPs (digits only) are standard for SMS verification. Alphanumeric OTPs include uppercase letters for stronger security.
Is this generator secure?
Yes. It uses crypto.getRandomValues() from the Web Crypto API, which provides true cryptographic randomness.
How long should my OTP be?
6 digits is the industry standard. Use 4 for low-risk scenarios and 8 for high-security needs.