Frequently Asked Questions

Why did we build this?

arrow

We're developers - and we wanted to share a tool that's useful for us, with other developers. This is a credit card number generator allows you to test shopping sites, payment forms, or perhaps generate datasets for the next great fintech app you're working on. If you liked the tool, have some feedback, or perhaps you'd like us to help you out with your fintech project, we're all ears!

What is Luhn's algorithm?

arrow

Luhn's algorithm is used as a checksum, a way to validate a number by checking the number of the number in a given sequence. Luhn's algorithm is commonly employed in government-issued IDs, as well as by every major credit card company. AMEX (American Express), Visa, and Mastercard all use numbers that follow credit card validation procedures using Luhn's algorithm. Luhn's algorithm doesn't detect suspicious activity when it comes to credit card numbers but is used for verification purposes. The algorithm detects simple errors and can therefore identify a valid card from an invalid one. The same process works for debit cards as well as other products like government-issued IDs.

What card issuers are supported?

arrow

The tool supports credit card numbers issued on the Visa, Mastercard and Amex (American Express) network.

Is using the tool going to cost me?

arrow

Using the tools is absolutely free.

What’s the difference between the “Single” and “Advanced” features?

arrow

If you’re a developer and want to generate a number of cards at one go to insert them into your database, the Advanced feature allows you to do so.

Is there a limit to how many credit card numbers I can generate?

arrow

No. The cards are generated in your browser and you can generate as many as you want.

Is the tool going to work for debit cards as well?

arrow

Credit and debit cards follow the same format and Luhn’s algorithm.

How do you validate the credit cards?

arrow

The credit card numbers that are generated follow a standard format and are checked against the validation procedures from Luhn’s algorithm. -> “What is Luhn’s algorithm?”