Numeric Password Generator

A numeric password generator creates passwords and PINs using only digits (0–9). This is useful for systems that require numeric-only codes, legacy databases, and PIN-based authentication. While the entropy per character is lower, sufficient length provides adequate security for constrained use cases.

    🔒 Passwords are generated in your browser and never transmitted to any server.

    Numeric passwords and entropy

    Each digit provides log₂(10) ≈ 3.32 bits of entropy. Common PINs of 4–6 digits are very weak (13–20 bits) and primarily rely on rate-limiting for protection. For numeric-only systems where length is flexible, use at least 10 digits to achieve ~33 bits, or 16 digits for ~53 bits — comparable to a strong short password.

    When numeric-only passwords are required

    Some applications require numeric-only codes: voicemail PINs, ATM PINs, alarm codes, certain legacy databases, and some government systems. When constrained to numbers, maximize length as much as the system allows. Avoid predictable patterns like birth years, sequential numbers (123456), or repeated digits (111111).

    Frequently Asked Questions

    4-digit PINs (10,000 combinations) are very weak and suitable only where attempts are strictly rate-limited (ATMs, phone locks). For sensitive systems, use at least 8–12 digits. Our generator defaults to 8 digits, which provides ~27 bits of entropy.

    Numeric passwords have low entropy per character. A 6-digit PIN has only 10^6 = 1 million possibilities — crackable in seconds offline. They are only safe when the system enforces strict rate-limiting, account lockouts, or 2FA. Whenever possible, use alphanumeric or full-character passwords.

    Length is the only variable — you can't vary character types. Each additional digit multiplies possibilities by 10. Going from 6 to 12 digits multiplies the search space by 1 million. Use the maximum length the system allows.

    Most online accounts accept and prefer mixed-character passwords. Only use numeric passwords when a system specifically requires it. If you must use a numeric password for an online service, make it at least 12 digits and enable 2FA.