Random PIN Generator
Generate random numeric PINs for phone locks, 2FA backup codes, safes, and debit cards. Crypto-random digit selection with rejection sampling.
6 digits is the standard for 2FA codes and phone unlock screens. For high-value secrets, use a real password instead.
About Random PIN
Random PINs are short numeric-only passwords: 4 to 12 digits, each picked uniformly from 0–9 via crypto.getRandomValues with rejection sampling to eliminate modulo bias. They exist where text-entry is awkward or where the destination only accepts digits: phone lock screens, 2FA backup codes, bank card PINs, combination safes, door-entry keypads, voicemail passcodes. The security properties are blunt: 4-digit PIN has 10^4 = 10,000 possible values, brute-forced in seconds without rate-limiting. 6 digits raise the ceiling to 10^6 = one million — which is what most phone lock screens and 2FA apps use because the device-level rate-limit (wiped after 10 wrong attempts) makes brute-force impractical. 8-digit PINs give ~27 bits of entropy; 12 digits give ~40 — still weaker than a short random alphanumeric password, but safe enough when rate-limiting is enforced. A caveat the generator enforces: picked digits are uniformly random, not weighted. Real-world human-chosen PINs are heavily biased (1234, 0000, 1111, birthdays) and attackers know this — a huge study by Nick Berry found 27% of human-chosen 4-digit PINs are in the top 20 values. Every PIN this generator produces is drawn uniformly at random, which means no predictable patterns, no accidental birthdays, and no duplication bias.
Features
- Generate cryptographically secure random passwords
- Customize password length and character types
- Include uppercase, lowercase, numbers, and symbols
- Generate multiple passwords at once
How to Use
- Set your desired password length using the slider
- Toggle character types (uppercase, lowercase, numbers, symbols)
- Click "Generate" to create secure passwords
- Click any password to copy it to your clipboard
Frequently Asked Questions
Is a 4-digit PIN secure?
Only with rate-limiting. 4 digits = 10,000 possible values, brute-forced in seconds on a leaked hash. Phone lock screens use 4-digit PINs safely because the device wipes after 10 failed attempts — that rate-limit is what's keeping your phone secure, not the PIN length.
Should I use 6 or 8 digits for a bank card?
4 or 6 is standard in most markets (Europe uses 4, the US is split between 4 and 6, China uses 6). More digits don't help much at an ATM — the physical card, the daily withdrawal cap, and the bank's fraud model are the real defences. The PIN is just to prove you're the cardholder.
Are the PINs truly random?
Yes. Every digit comes from crypto.getRandomValues with rejection sampling to eliminate modulo bias (a subtle flaw where % 10 on certain RNG outputs produces slightly uneven distributions). The result is indistinguishable from physical dice rolls and carries no patterns an attacker could exploit.
Can I use a PIN as a password?
No — unrate-limited PINs are trivially brute-forceable. If a website lets you set a "PIN" as your password, use the Strong or Memorable generator instead; PINs belong on devices and accounts with rate-limit protection like phones, SIM cards, 2FA apps, and physical locks.
Other Password Generator variants
Strong Password
Generate long random passwords using the browser's cryptographically secure random source. 16–64 characters with mixed case, digits, and symbols.
Memorable Passphrase
Generate easy-to-remember 4–8 word passphrases joined by hyphens. Diceware-inspired, crypto-random word selection, strong against brute-force.