Create secure one-time passwords for SMS, email or in-app verification. Numeric or alphanumeric, in bulk, with weak codes automatically filtered out.
Verification codes protect accounts only if they are hard to guess. A 6-digit numeric code has 1,000,000 combinations, and when paired with rate limiting and short expiry that is sufficient for most SMS logins. Longer alphanumeric codes are common for backup codes and enterprise SSO. This generator draws from the Web Crypto secure random source and additionally rejects codes with obvious patterns — sequential digits, single repeated digit, and duplicates within a batch.