# PIN Generator > Generate 4, 6, or 8-digit PINs that avoid obvious patterns like 1234, 0000, or birthdays. - URL: https://generate.now/pin - Category: identity - Price: free, no account required - AI-powered: no - Last updated: 2026-08-27 ## What it does Generate numeric PINs with optional filters that exclude common weak patterns — sequential digits, repeated digits, palindromes, and the most-leaked codes from password breach data. Bulk generation supported. ## When to use it - Issue a temporary PIN for a hardware device - Pick a PIN that isn't on the top-20 leaked list - Bulk-generate PINs for one-time-use codes - Get a 6-digit PIN that isn't a birthday ## Examples ### 6-digit, exclude weak ``` 739184 ``` Not sequential, not repeated, not on the leaked-PIN top list. ### 100 × 4-digit ``` 100 unique PINs, one per line ``` Useful for one-off codes or load testing. ### 10 × 4-digit, exclude weak ``` 8317, 4926, 7053, 2694, 9142, 6708, 3571, 8264, 1935, 7420 ``` None sequential, repeated, or palindromic; all distinct within the batch. ### 8-digit device pairing code ``` 40719286 ``` Longer codes suit pairing flows where there's no lockout to lean on. ## Frequently asked questions ### How weak is a 4-digit PIN really? Only 10,000 possibilities, and almost a third of users pick from the same 20 codes (1234, 1111, 0000, etc). For anything user-facing, 6 digits is a meaningful upgrade. ### What patterns does 'exclude weak' filter? Sequential ascending or descending (1234, 9876), all-same digits (0000, 9999), palindromes (1221), keyboard rows, and PINs that appear in the top 1,000 of leaked datasets. ### How many digits should a PIN be? Four digits is 10,000 combinations and six is 1,000,000. Four is only defensible behind a hard attempt limit — three tries then lockout, the way a SIM card works. If an attacker can guess without limit, or the PIN protects anything of value, use six or more. ### Can I use these as one-time codes? Yes, provided each one is single-use and short-lived — five to ten minutes is typical. Don't use them for authenticator-app codes: those are derived from a shared secret and the current time via TOTP, so they have to come from a proper implementation rather than a random number. ### Does excluding weak patterns make PINs easier to guess? It shrinks the keyspace slightly, which sounds bad but isn't. The excluded codes are the ones attackers try first — 1234, 0000, birthdays, repeated pairs — and a handful of them cover a startling share of real-world PINs. Removing them raises the expected number of guesses substantially. ### Are PINs unique within a batch? Yes. Bulk generation de-duplicates within the batch, so a request for 100 four-digit PINs returns 100 distinct values. Since there are only 10,000 four-digit PINs in total, large batches with weak-pattern exclusion on will start to fail — the tool tells you when the request can't be satisfied. ## References - [SP 800-63B: Digital Identity Guidelines](https://pages.nist.gov/800-63-3/sp800-63b.html) — NIST. Guidance on memorized secrets, including minimum entropy for numeric PINs. - [Crypto.getRandomValues()](https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues) — MDN Web Docs. The cryptographically secure source used to avoid biased digit distribution. ## Related tools - [Password Generator](https://generate.now/password): Generate strong random passwords or memorable passphrases. Length, character classes, bulk mode — all local. - [Random Number Generator](https://generate.now/random-number): Generate random integers or floats in any range. Bulk output, allow-repeats toggle, seeded mode for reproducible runs. - [API Key Generator](https://generate.now/api-key): Strong API keys and secrets with prefix support — sk_test_, pk_live_, or your own. Configurable length and charset, bulk mode.