Free PIN Generator

Generate cryptographically secure random PINs of any length. Customise digit count, avoid common patterns, create formatted grouped codes, and bulk-generate up to 200. Nothing is ever sent to a server.

Quick Select

Custom Length

6 ~20 bits

468121620

Security Options

No Repeating Digits No Sequential (123, 456) No Palindromes (1221) Avoid Common PINs

Your PIN

Generate multiple unique PINs at once — ideal for seeding test accounts, provisioning temporary access codes, or creating a set of one-time verification PINs.

PIN Length

Quantity

Max 200

Ensure All Unique No Sequential Digits Avoid Common PINs

Generated PINs

Generate PINs with grouped digit formatting — perfect for Wi-Fi WPS codes, locker combinations, vehicle alarm codes, and any access code that needs to be read aloud or transcribed from a screen.

Total Digits 8

481216

Group Format

Separator

Include Letters (A–Z) Allow Leading Zeros

Your Formatted PIN

All PINs generated in your browser Uses crypto.getRandomValues() Nothing ever sent to a server

PIN Strength & Use-Case Reference

Show

PIN Length	Combinations	Common Use	Rating
4 digits	10,000	ATMs, legacy phone lock screens	Minimal
5 digits	100,000	Basic access codes, locker combos	Weak
6 digits	1,000,000	SMS OTPs, modern phone PINs, banking apps	Adequate
8 digits	100,000,000	Device encryption, security systems	Good
10 digits	10,000,000,000	High-security vaults, enterprise devices	Strong
12+ digits	1 trillion+	Encryption keys, authentication tokens	Very Strong ✓

Most common (worst) PINs to avoid: 1234 · 0000 · 1111 · 1212 · 7777 · 1004 · 2000 · 4444 · 2222 · 6969 · 9999 · 3333 · 5555 · 6666 · 1122 · 1313 · 8888 · 4321 · 2001 · 1010 These account for over 25% of all 4-digit PINs in use according to breach data analysis. The "Avoid Common PINs" option excludes all of them.

100% client-side — no server contact

Instant generation

Free, no sign-up needed

What This PIN Generator Does

Three modes cover every PIN generation scenario. Single PIN generates one PIN at a time with a configurable digit length (4–20), quick-select chips for the most common lengths, and four security filters: no repeating digits, no sequential runs, no palindromes, and avoidance of the most commonly observed PINs in breach data. A strength bar and entropy calculation update with each generation. Bulk mode generates up to 200 unique PINs in one pass with deduplication, sequential filtering and common-PIN avoidance, downloadable as a plain-text file.

Formatted PIN mode groups digits with a separator character into patterns used by Wi-Fi WPS codes, locker combinations, vehicle security systems and enterprise provisioning codes — supporting five grouping formats, four separator characters, optional alphanumeric characters (A–Z), and a leading-zero control. All generation uses crypto.getRandomValues() — the browser's CSPRNG — and no data is ever transmitted. The PIN Strength Reference card explains the combination count, entropy, and recommended use case for each digit length alongside the most dangerous PINs to avoid.

Tips for Getting the Best Results

Enable Avoid Common PINs on every generation — the 20 most-common 4-digit PINs alone account for over a quarter of all PINs in breach databases. Filtering them out costs you nothing and meaningfully improves security.
For any system without strict lockout enforcement, use at least 6 digits. A 4-digit PIN provides only 10,000 combinations — an automated attacker without lockout can exhaust the entire space in minutes.
Enable No Sequential and No Palindromes together for the best combination of randomness filters. These patterns are tested first in dictionary-style PIN attacks because they represent a large share of real-world PIN choices.
For device encryption PINs where offline brute-force is possible, use 8+ digits. At 8 digits with no patterns, an attacker attempting 1 billion guesses per second would take over 100 seconds just for a 50% chance of success.
Use Formatted PIN mode when the PIN will be read aloud or transcribed from a screen — groups of 3–4 digits separated by hyphens dramatically reduce transcription errors compared to an unformatted 8-digit string.
Whatever PIN you generate, always pair it with a strong account password from our Password Generator and store any server-side PIN representation using our Bcrypt Hash Generator.

Frequently Asked Questions

Is this PIN generator truly random and secure?

Yes. Every PIN generated here uses crypto.getRandomValues() — the browser's Cryptographically Secure Pseudo-Random Number Generator (CSPRNG), seeded from hardware entropy sources including CPU timing jitter and system interrupts. This is fundamentally different from Math.random(), which uses a deterministic algorithm that can be seeded and predicted — making it entirely unsuitable for security-sensitive values. Each digit is drawn independently from a uniform distribution over 0–9, with a rejection sampling loop to eliminate modular bias, so the output is statistically indistinguishable from a hardware random number generator.

You can verify that no network requests are made by opening your browser's Developer Tools, navigating to the Network tab, and clicking Generate — the request log stays empty after the initial page load. The tool works fully offline once loaded. For longer alphanumeric secrets that need more entropy than a numeric PIN provides, our Password Generator and Secure Token Generator produce higher-entropy credentials using the same cryptographic primitives.

How many digits should my PIN be?

The right length depends entirely on your use case and the attack model the PIN faces. A 4-digit PIN has only 10,000 possible combinations — an attacker making 10 guesses per second would exhaust the entire space in under 17 minutes without lockout protection. This is why ATMs enforce a 3-attempt hardware limit: the 10,000-combination space is only safe when guessing is strictly throttled by the physical device. Most modern banking apps and phone lock screens require 6-digit PINs (1,000,000 combinations) as their minimum configuration.

For device encryption where an attacker can attempt billions of guesses per second offline after extracting the encrypted volume, 8 digits (100 million combinations) is a practical minimum — even then, at 1 billion guesses per second the full space is exhausted in 100 seconds, making strong randomness (no patterns, no common PINs) essential. For high-security scenarios — encryption keys, vault codes, enterprise device management — use 10 or more digits. If the protected resource is critical enough that you are considering PIN length carefully, also evaluate whether a full password with mixed characters would offer substantially better coverage than a purely numeric PIN of equivalent length.

What PINs should I always avoid?

Security researchers analysing millions of leaked credential databases consistently find a small set of PINs that account for a disproportionate share of all real-world choices. The single worst offenders are: 1234 (the most common 4-digit PIN by a very large margin), all repeated-digit patterns (0000, 1111 through 9999), sequential runs (1234, 2345, 4321, 9876), birth years from 1960–2009 which users commonly embed in PINs, and personally significant numbers like anniversaries and the last four digits of phone numbers. The "Avoid Common PINs" filter on this tool excludes the 40+ most-observed combinations from breach database analysis.

The "No Sequential Digits" filter blocks ascending and descending runs of three or more consecutive steps anywhere in the PIN — patterns like 123, 456, 876 and 987 embedded in any position. The "No Palindromes" filter removes symmetric patterns like 1221, 3443 and 1001 that are memorably patterned but overrepresented in real datasets. Using all filters together substantially narrows the predictable portion of the keyspace even at 4 digits, and costs nothing in terms of randomness quality at 6 digits or more where the alternative pool is large. Pair any PIN with strong credential hygiene by checking other credentials with our Password Strength Checker.

What is the difference between a PIN and a password?

A PIN (Personal Identification Number) is strictly numeric — digits 0–9 only. Its security relies entirely on two factors: its length, and the lockout policy enforced by the protecting system. ATM cards permit 3 wrong attempts before physically blocking the card, which makes a 4-digit PIN viable despite its small 10,000-combination space because brute force is physically impossible regardless of computing power. The PIN provides authenticity only when paired with a physical token (the card itself) — neither factor alone is sufficient.

A password combines uppercase letters, lowercase letters, digits and symbols from a pool of 94+ printable characters, delivering vastly more combinations per character. A 6-character fully random password provides approximately 689 billion combinations — roughly 690 times more than a 6-digit PIN. For any system without strict hardware-enforced rate-limiting and lockout, a password is substantially more resistant to attack than a PIN of equivalent character count. Use our Password Generator for password-based credentials, and our Password Strength Checker to evaluate whether existing passwords are strong enough for the resources they protect.

What is the "No Sequential Digits" option and why does it matter?

This option prevents the generator from outputting PINs that contain ascending or descending runs of three or more consecutive digits — patterns like 123, 234, 567, 987 and 876 embedded anywhere in the PIN. These are among the first sequences tested in any automated brute-force or dictionary attack, because humans choose them for ease of memorisation and the natural finger-movement patterns they produce on numeric keypads: 123, 456, 789 flow diagonally down a standard keypad layout, and 147, 258, 369 flow vertically. Any attack tool worth using will test all sequential permutations in its first pass.

The filter does not exclude every adjacent identical digit pair — for example, the digit "33" within a longer PIN is still permitted — it specifically targets directional runs of at least three consecutive steps in either ascending or descending order. Combined with "Avoid Common PINs", this option removes the most predictable portion of the numeric keyspace. At 6 digits or longer, there are still hundreds of thousands of valid combinations remaining after both filters are applied, so your PIN remains genuinely random within a safer subset of the full space.

What is a palindrome PIN and why should I avoid it?

A palindrome is a string that reads identically forwards and backwards. PIN examples include 1221, 3443, 1001, 2332, 12321 and 123321. These appear in real-world breach data at rates significantly higher than random chance would predict, because symmetric patterns are both cognitively easy to construct on a number pad — you simply enter the first half, then reverse it — and easy to recall, since the reversal structure provides a mnemonic. While less common than all-repeated or purely sequential PINs, they still appear earlier in targeted attack dictionaries than non-palindromic PINs because attackers know users favour them.

The "No Palindromes" filter on this generator eliminates them entirely. For 4-digit PINs, there are 90 palindromes (any of the 9 combinations for the first digit times 10 for the second digit, noting the first digit cannot be zero for non-palindromic counting but palindromes like 0110 still occur) out of 10,000 total — a small absolute count but one that represents a disproportionate share of real-world choices. At 6 digits or more, the filter removes an even smaller percentage of the available space while meaningfully improving predictability metrics against targeted attack tools.

What are formatted PINs used for?

Formatted PINs group digits with separator characters to improve readability when a PIN must be read aloud, transcribed from a screen to a physical keypad, or entered on a shared display where digit position must be tracked visually. Without grouping, an 8-digit PIN like 73924801 requires careful counting to confirm you have not skipped or doubled a digit. With 4–4 grouping and a hyphen separator — 7392-4801 — the two halves can be memorised and entered independently, dramatically reducing transcription errors in practice.

Common real-world uses for formatted PINs include Wi-Fi WPS codes (standardised as 4–4 or 4–3–3 digit groupings), vehicle security system codes (often 3–3 with a hyphen), enterprise device provisioning codes, software licence keys, and locker combination codes displayed on admission tickets. The Formatted PIN mode on this tool supports five grouping patterns, four separator characters, an optional A–Z alphanumeric extension for systems that support mixed character codes, and a leading-zero control for systems that parse PINs as integers and would truncate a leading zero. For structured API credentials with similar formatted appearance but substantially higher entropy, our Secure Token Generator produces cryptographically dense random tokens in multiple formats.

Can I use this tool to generate OTP verification codes?

This tool generates static cryptographically secure random PINs, which are suitable for single-use verification codes sent by email or SMS, temporary access codes, and backup recovery codes. They are not time-based OTPs (TOTP). A proper TOTP as used in authenticator apps like Google Authenticator, Authy or Microsoft Authenticator is generated by the HMAC-based One-Time Password algorithm (HOTP/TOTP, RFC 6238), which derives a new 6-digit code every 30 seconds from a shared secret and the current Unix timestamp — not a random number generated at the moment of use.

The 6-digit PINs generated here are cryptographically sound for single-use scenarios where you control the delivery channel (email, SMS, printed slip) and the verification logic. The key difference is that a TOTP code expires automatically after 30 seconds because the verifier independently recomputes the expected code from the shared secret and current time — a static randomly generated PIN does not expire unless your application explicitly invalidates it after use or after a timeout. For generating API keys and session tokens in developer contexts, use our Secure Token Generator. For hashing PINs before database storage, use our Bcrypt Hash Generator.

Should I hash PINs before storing them in a database?

Absolutely — storing raw PINs in a database is a serious security risk. If your database is compromised through SQL injection, a misconfigured backup, or any other breach, every user's PIN is immediately exposed and usable without any further computation. PINs must be stored as hashed values with a unique per-user random salt, just like passwords. However, the small search space of numeric PINs creates an additional challenge that does not exist for longer passwords: because a 4-digit PIN has only 10,000 possible values, even a very slow hash function like bcrypt at cost 12 can be iterated over the entire keyspace in under a second on modern hardware.

This means that for PIN storage, strict server-side rate-limiting and account lockout are not optional extras — they are essential security controls regardless of the hash function used. The combination of a deliberately slow hash (bcrypt cost 12+, Argon2id, or scrypt — never MD5 or SHA-256 which run at billions of iterations per second) plus aggressive lockout (3–10 failed attempts triggers a timeout or account freeze) provides defence in depth. Our Bcrypt Hash Generator produces correctly salted production-ready bcrypt hashes that you can test your application's verification logic against. For a complete picture of credential security, pair this with our Password Strength Checker and our Hash Generator for non-password integrity verification.