Question 1

What format patterns can I use?

Accepted Answer

Use X for uppercase letters, # for digits, A for alphanumeric (uppercase+digits), and a for lowercase letters. Separate groups with dashes. For example, XXXX-XXXX-XXXX-XXXX generates like ABCD-EFGH-IJKL-MNOP, while ####-#### generates like 1234-5678.

Question 2

Can I generate unique serial numbers?

Accepted Answer

Yes. The tool uses a Set to guarantee uniqueness within each batch. Enable the deduplicate option and generate up to 1000 unique serial numbers at once.

Question 3

What is the checksum option?

Accepted Answer

When enabled, a Luhn checksum digit is appended to each generated number. This helps detect typos when users manually enter serial numbers, similar to credit card number validation.

Question 4

Are these serial numbers cryptographically random?

Accepted Answer

Yes. The tool uses crypto.getRandomValues() for cryptographically secure random generation, making the serial numbers unpredictable and suitable for security-sensitive applications like license keys.