Random 4-Digit Number Generator

Our generator uses the Web Crypto API (crypto.getRandomValues()), which provides cryptographically secure random numbers. This means the numbers are truly random and unpredictable, suitable for security-sensitive applications like verification codes and PINs. The randomness quality is significantly higher than Math.random().

Yes! When using the bulk generator, simply uncheck the "Allow Duplicates" option. Our algorithm will ensure all generated numbers in the batch are unique. This is perfect for creating unique verification codes or test data sets.

Absolutely! Our 4-digit random number generator is 100% free with no hidden costs, subscriptions, or premium features. You can generate unlimited numbers without any restrictions. No registration or payment is ever required.

While our generator uses cryptographically secure randomness, 4-digit numbers (0000-9999) only provide 10,000 possible combinations. This is generally not sufficient for passwords. However, they are perfect for temporary verification codes, PINs, and two-factor authentication where additional security layers exist.

Currently, the bulk generator is limited to 1000 numbers per batch to ensure optimal performance. If you need more numbers, you can generate multiple batches and combine them. For very large datasets (10,000+), consider using our API or running multiple generations.

No, we never store, log, or transmit your generated numbers. All number generation happens entirely in your browser using JavaScript. Your numbers stay on your device and are never sent to our servers. We respect your privacy completely.

We offer four format options: Plain (1234), Hyphen (12-34), Dot (12.34), and Prefix (#1234). These formats are purely cosmetic and help match different use cases. For example, hyphen format is common for verification codes, while prefix format is useful for ID numbers.

Yes! In the advanced settings, you can enable exclusion rules to prevent sequential numbers (like 1234 or 4321) and repeated digits (like 1111 or 2222). This is useful when you need more "random-looking" numbers or want to avoid easily guessable patterns.

After generating a batch of numbers, click the Export button. You can choose from three formats: TXT (plain text, one number per line), CSV (spreadsheet-compatible with metadata), or JSON (structured data for programming). The file downloads instantly to your device.

While our generator provides truly random numbers suitable for picking lottery numbers or making random selections, please note that we cannot guarantee winning outcomes. Use responsibly and remember that gambling involves risk. Our tool is designed primarily for development, testing, and security applications.

Our tool works on all modern browsers including Chrome, Firefox, Safari, Edge, and mobile browsers. The Web Crypto API is supported in all browsers released after 2014. For the best experience, we recommend using the latest version of your preferred browser.

The range setting allows you to specify minimum and maximum values for generation. For example, setting range 1000-5000 will only generate numbers between 1000 and 5000. This is useful when you need numbers within a specific subset of the 0000-9999 range.