Random PIN Generator
Uniformly random numeric PIN codes with no patterns.
Why generate a PIN?
Humans are terrible at picking PINs. The widely-cited DataGenetics analysis of about 3.4 million exposed four-digit PINs found that 1234 alone accounts for roughly 11% of them, and the twenty most common PINs — 1234, 1111, 0000, birth years, repeated pairs — cover about 27% between them. Attackers try exactly those first. A uniformly random PIN removes every pattern: each digit is drawn independently with crypto.getRandomValues() using rejection sampling, so all 10,000 four-digit codes (or 10¹² twelve-digit codes) are exactly equally likely.
Know what a PIN can and can't do
Even a random PIN is a small secret: 4 digits is only ~13 bits of entropy, 6 digits ~20 bits, 12 digits ~40 bits. That's fine for its intended job — codes protected by rate limiting or lockout, like SIM cards, phone lock screens, bank cards that swallow after three attempts, or door keypads that throttle. It is nowhere near enough for anything an attacker can try offline: never use a PIN as a password, an encryption key or an API secret. For those, use a random password or passphrase instead.
Practical tips
Prefer 6+ digits when the device allows it, don't reuse a banking PIN elsewhere, and if a system lets you choose the length, longer is strictly better. As with every tool on this site, the PIN is generated on your device and never sent, logged or stored.
How many digits should a PIN be?
As many as the device allows — prefer 6 or more. Four digits is only about 13 bits of entropy and six is about 20, which is why a PIN only works where something rate-limits or locks out an attacker: a SIM card, a phone lock screen, a bank card that swallows after three tries.
Is a random PIN really safer than one I choose?
Substantially. Analyses of leaked datasets show 1234, 0000 and birth years cover a large share of all four-digit PINs, and attackers try those first. A uniformly random PIN has no pattern to guess — all 10,000 four-digit codes are exactly equally likely here.
Can I use a PIN as a password or an encryption key?
No. A PIN is a small secret by design and it is only safe behind rate limiting. Anything an attacker can attack offline — a password, an encryption key, an API secret — needs far more entropy. Use a random password or a passphrase for those.
Nothing leaves your browser
- Don't take our word for it — turn off your wifi. Every generator on this site keeps working with the network disconnected. That's the whole proof, and it takes five seconds.
- Every value comes from
crypto.getRandomValues()— the CSPRNG built into your browser, neverMath.random(). - Generated secrets are never transmitted, logged or stored: no server-side generation, no cookies, no localStorage.
- Verify it yourself in the network tab: after loading, the page only talks to our self-hosted, cookie-less analytics — which counts page views and which generator type gets copied, never any value.
- Strict Content-Security-Policy; no third-party script origins.
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