PIN Generator
Generate secure random PIN codes of 3 to 12 digits, with rules that block common and sequential PINs.
–
How it works
Pick a length between 3 and 12 digits, choose how many codes you need, and a fresh PIN
appears immediately — every slider move, number change or checkbox tick regenerates it.
The digits come from crypto.getRandomValues(), the browser's cryptographically
secure random number generator, and each digit is drawn with rejection sampling so that
0–9 are exactly equally likely. Math.random() is never used, which matters
because a PIN drawn from a predictable source is only as strong as the seed behind it.
The rule checkboxes exist because truly random codes occasionally land on a PIN a thief would try first. "Avoid common PINs" blocks the well-known top codes — 1234, 1111, 0000, 1212, 7777, 2580 and friends — which together account for a startling share of every PIN in use. "No straight sequences" rejects runs like 3456 or 9876 and all-identical codes. "No repeated digits" gives you a code where every digit appears once (so a maximum length of 10), handy when the PIN must be typed on a worn keypad where smudges give away which keys are used. "No leading zero" is for systems that silently strip it.
The line under the output shows how many codes exist at that length and the matching bits of entropy: a 4-digit PIN has 10,000 combinations (about 13.3 bits), a 6-digit PIN has a million (about 19.9 bits). If the system allows it, longer is dramatically better. Nothing here touches a network — no ads, no analytics on your output, no server call — so the PIN exists only in this tab until you copy or download it, and the page keeps working offline once loaded. Generate up to 100 at once for a batch of cards, lockers or door codes.
Frequently asked questions
What is a good 4-digit PIN?
A good 4-digit PIN is one you did not choose yourself. Human-picked PINs cluster hard: 1234, 1111, 0000, 1212 and birth years cover a large share of all codes in use, so a thief tries those first. A good PIN is drawn at random from all 10,000 combinations, avoids straight runs like 3456 or 9876, avoids all-identical digits, and is not a date that appears on your ID or social media. This generator applies those filters for you — leave "Avoid common PINs" ticked and take whatever it gives you.
How do I create a secure PIN code that is hard to guess?
Three things matter, in order: use random digits, use as many of them as the system allows, and never reuse the PIN anywhere else. A 4-digit PIN has 10,000 combinations (about 13.3 bits of entropy); a 6-digit PIN has a million (about 19.9 bits), which is a hundred times harder to guess for two extra keystrokes. Turn on "No repeated digits" if the PIN is typed on a shared keypad, because worn or smudged keys reveal which digits are used and repeats shrink the search space further. Then store it in a password manager rather than writing it on the card.
Are the PINs generated here random and safe to use?
Yes. Every digit comes from crypto.getRandomValues(), the browser's cryptographically secure random number generator, drawn with rejection sampling so 0 through 9 are exactly equally likely — Math.random() is never used. Just as important, the PIN is created in your own browser tab and never sent anywhere: there is no server call, no API and no logging, so there is nothing to intercept or leak. The page even keeps working offline once loaded. Close the tab and the code is gone, so copy or download it first.