Credit Card Generator
Create fake card numbers that pass format checks, for testing only
What the Credit Card Generator Does
Developers who build checkout pages, payment forms and billing software need card numbers to test with, and they must never use real ones. The Credit Card Generator on WebTOOLkt creates dummy numbers that follow the structure real card numbers use, so a form that checks the format will accept them. Choose a card type, generate a number and use it in your own development or testing environment.
These numbers are not connected to any bank, account or person. They carry no money, and they cannot be used to buy anything.
Important: For Testing Only
The numbers produced by this tool exist purely for software testing, training and demonstration. Using a generated number to try to pay for goods or services, or to deceive a person or business, is fraud, and the tool is not designed for that. A payment will fail anyway, because the number does not belong to a real account. If you need to test an actual payment flow, use the official test card numbers published by your payment provider, such as those in the Stripe testing documentation.
How to Use the Credit Card Generator
- Open the tool and choose the card network you want to simulate.
- Generate a number and copy it.
- Paste it into the form or application you are testing in a safe, non production environment.
- Use any future expiry date and a made up security code if the form requires them.
- Repeat with other card types to check that your form handles each one.
Generate several numbers per card type when you test validation, so your tests do not depend on a single value.
How Card Numbers Are Structured
A card number is not random. The first digits identify the card network and the issuer, the length depends on the network, and the final digit is a check digit calculated from all the others. The calculation is called the Luhn algorithm, a simple checksum designed to catch typing mistakes. You can read how it works on Wikipedia, and the numbering scheme is described in its article on payment card numbers.
A generated number passes the Luhn check and follows the right pattern, which is exactly what a format validator looks for. It does not mean the card exists. Only the issuing bank can confirm that.
Who Uses It
- Web developers. Test checkout forms and error messages for invalid input.
- QA testers. Build test cases for different card networks.
- Teachers and students. Demonstrate how validation works without exposing real data.
- Software vendors. Fill demos and screenshots with safe sample values.
- Documentation writers. Show example card numbers in tutorials without leaking anything real.
Best Practices for Safe Testing
Never use real card numbers in a development or staging environment. Keep test data apart from live data, and make sure your test site never sends transactions to a live payment gateway. Where you handle real payments, follow the PCI Security Standards Council guidance for protecting cardholder data. Most payment providers offer a sandbox mode that behaves like the real system with fake money, and that is the right place to test complete payment flows.
Why Use This Tool Instead of Other Options
Searching for sample numbers online often turns up outdated lists or numbers copied from questionable places. The Credit Card Generator gives you fresh values that pass the format check, free and without an account. It also works hand in hand with the Credit Card Validator on WebTOOLkt, so you can generate a number and then confirm your validation logic accepts it.
Related WebTOOLkt Tools
- Credit Card Validator to check whether a number passes the format test.
- Password Generator to create strong random passwords.
- MD5 Generator to create hashes for testing.
- Base64 Encode to encode test data.
- JSON Formatter to tidy API payloads while you test.
- Lorem Ipsum Generator to create placeholder text for mock forms.
Useful External Resources
Frequently Asked Questions
Can I use these numbers to buy something?
No. They are not real accounts, and any payment attempt will be declined.
Are the numbers valid?
They pass the format and checksum test but do not belong to any real card.
Which numbers should I use for payment gateways?
Use the official test numbers from your provider's documentation, since gateways recognise only their own test values.
