PIN Generator

Generate 4, 6, or 8-digit PINs that avoid obvious patterns like 1234, 0000, or birthdays.

Length
How many
Press Generate

Pick a length and hit Generate.

01 — Overview

How the PIN Generator works

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.

02 — Use cases

When to use the PIN Generator

  1. 01

    Issue a temporary PIN for a hardware device

  2. 02

    Pick a PIN that isn't on the top-20 leaked list

  3. 03

    Bulk-generate PINs for one-time-use codes

  4. 04

    Get a 6-digit PIN that isn't a birthday

03 — Examples

PIN Generator examples

6-digit, exclude weak

ex 01

739184

Not sequential, not repeated, not on the leaked-PIN top list.

100 × 4-digit

ex 02

100 unique PINs, one per line

Useful for one-off codes or load testing.

10 × 4-digit, exclude weak

ex 03

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

ex 04

40719286

Longer codes suit pairing flows where there's no lockout to lean on.

04 — FAQ

PIN — 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.

05 — Reference

Specs and further reading

The primary sources this tool follows. Where behaviour is defined by a specification, we link the specification rather than a summary of it.

07 — More

Tools that pair with PIN

Password Generator

Generate strong random passwords or memorable passphrases. Length, character classes, bulk mode — all local.

Identity/password

Random Number Generator

Generate random integers or floats in any range. Bulk output, allow-repeats toggle, seeded mode for reproducible runs.

Data/random-number

API Key Generator

Strong API keys and secrets with prefix support — sk_test_, pk_live_, or your own. Configurable length and charset, bulk mode.

Auth/api-key

Last updated .