PIN Generator
Generate secure PINs with cryptographic randomness. Avoid sequential or repeated digits. Generate up to 10 PINs at once.
How to use PIN Generator
Generate cryptographically random PINs of any length — 4-digit, 6-digit, or custom length numeric codes. All generation uses the Web Crypto API for true randomness, never Math.random(). Use it for setting device PINs, generating one-time codes, creating temporary access codes, or testing PIN entry forms. Avoids trivially guessable patterns like 1234 or repeated digits.
- Select the PIN length: 4 (standard ATM/device), 6 (two-factor auth apps), or custom.
- Toggle "Avoid patterns" to exclude runs (1234), repetitions (1111), and common PINs (0000, 9999).
- Click Generate to create a new random PIN.
- Click Copy to copy the PIN to your clipboard.
- Click Generate again to create a new PIN without repeating the last one.
Your data never leaves your device — 100% private processing.
PIN security: 4-digit vs. 6-digit
A random 4-digit PIN has 10,000 possible values. If an attacker gets 10 guesses before lockout (typical for ATMs and phones), the probability of success is 0.1% — acceptable risk for physical-access scenarios with lockout. However, analysis of leaked PIN databases shows 20% of PINs are from a "top 20" list (1234, 0000, 1111, 1212, etc.), reducing the effective security dramatically. A random 6-digit PIN has 1,000,000 values and is standard for TOTP (time-based one-time passwords) in 2FA apps. This generator explicitly avoids the top 100 most-common PIN patterns.
| Length | Possible values | Security use case |
|---|---|---|
| 4 digits | 10,000 | Device PINs, ATM cards |
| 6 digits | 1,000,000 | TOTP 2FA, phone unlock |
| 8 digits | 100,000,000 | High-security numeric codes |
| 10 digits | 10,000,000,000 | Numeric activation codes |
Avoiding common PIN patterns
Research on leaked PIN databases reveals predictable human patterns that reduce real-world PIN security. The top 10 most common 4-digit PINs (1234, 0000, 1111, 1212, 7777, 1004, 2000, 4444, 2222, 6969) account for nearly 15% of all PINs in leaked datasets. Keyboard walk patterns (1234, 2580, 1357) and birth year patterns (19XX, 20XX) are also heavily over-represented. This generator filters out these predictable patterns and includes a "common PIN check" that warns if the generated PIN appears in the top-500 most used PINs list.
Glossary
- TOTP
- Time-Based One-Time Password — a 6-digit code that changes every 30 seconds, used in authenticator apps like Google Authenticator.
- Brute force
- Systematically trying all possible values — a 4-digit PIN can be brute-forced in under a second without lockout protection.
- Entropy
- The unpredictability of the PIN — a truly random 4-digit PIN has log2(10000) ≈ 13.3 bits of entropy.
- Lockout policy
- A security control that disables PIN entry after a set number of failed attempts, preventing brute-force attacks.
Related reading
Frequently Asked Questions
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Why use PIN Generator?
- Cryptographically random generators for secure use cases
- Fully configurable output — length, charset, quantity
- Download or copy output in one click
- No data logged or stored — 100% private generation
Common use cases
- Generate a strong random password for a new account
- Create test data with realistic-looking names and emails
- Produce random numbers for a classroom lottery
- Generate Lorem Ipsum placeholder text for mockups
- Create unique UUIDs for software development
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