💳 Test Credit Card Generator

How to Use This Tool

Choose a card brand and how many test numbers you need, then click Generate Test Cards. Each number is built from the brand's official test BIN range with a valid Luhn check digit, plus a random future expiry date and CVV so you can test full checkout forms. Use the per-card copy button or Copy All to grab everything at once. The official canonical test number for each brand is also shown for quick copy into Stripe or sandbox dashboards.

What Test Credit Cards Are (and Are Not)

Test credit card numbers are a normal, legitimate part of software development. Every major payment processor publishes test numbers so developers can exercise their checkout code without touching real money. Stripe, for example, documents 4242 4242 4242 4242 as its standard success card, plus special numbers that simulate declines, expired cards, and 3D Secure challenges. The card brands also reserve test ranges: the Visa numbers starting 411111, Mastercard numbers starting 555555, Amex numbers starting 378282, and Discover numbers starting 601111 that this tool uses are the industry's standard test values.

Here is the critical part: these numbers are not linked to any bank account, person, or line of credit. They exist only so that software can validate formats, run checksums, and talk to sandbox gateways. A test number entered on a real checkout will simply be declined. Worse, deliberately using fake or test numbers to obtain goods or services is fraud, plain and simple, and payment processors actively detect and ban accounts that try it. If you are building a store, test with your gateway's sandbox mode and these numbers, then switch to test mode off and use your own real card for the one live transaction you run to verify production. That is the entire legitimate lifecycle of a test card.

The Luhn Algorithm, Explained Simply

The Luhn algorithm is the reason a mistyped card number is usually caught before it ever reaches the bank. It is a checksum, a little piece of arithmetic that every valid card number must satisfy. Here is how it works on a 16-digit number. Starting from the rightmost digit (the check digit) and moving left, double every second digit. If doubling produces a number over 9, subtract 9 (so 8 becomes 16, then 7). Add up all the digits. If the total is a multiple of 10, the number passes. That is the whole algorithm, and it catches every single-digit typo and almost every adjacent-digit swap, which are the two most common entry errors.

Card issuers choose the final check digit specifically to make the checksum work, and this generator does the same: it builds a random number from the brand's test BIN, then computes the one check digit that makes the Luhn sum a multiple of 10. Try it yourself with a famous test number. Take 4111 1111 1111 1111, drop the last 1, double every second digit from the right, subtract 9 where needed, and add: the sum comes to 29, and the check digit 1 brings it to 30, a multiple of 10. Valid. That is why test numbers sail through front-end validation while random 16-digit strings almost always fail.

Using Test Cards With Stripe and Other Gateways

In Stripe test mode, use Stripe's own documented numbers for the most control: 4242 4242 4242 4242 always succeeds, 4000 0000 0000 0002 is always declined, and others trigger specific behaviors like 3D Secure or expired-card errors. Any future expiry and any 3-digit CVC works in test mode. Braintree's sandbox and PayPal's sandbox publish similar lists. The numbers this tool generates use the same official test BIN ranges, so they behave like genuine test data in sandbox environments: your form validation passes, the gateway recognizes the test range, and no money moves. When you go live, flip the gateway to production mode and never paste a test number into a live checkout, not even "just to see what happens". Keep test data and production data strictly separate, the way you would keep staging and production databases separate.

A Serious Note on Fraud

This bears repeating because the line is bright and the consequences are real. Generating test card numbers for your own development is legal and standard. Using test numbers, fake numbers, or anyone else's numbers to attempt real purchases is fraud, and it can lead to banned merchant accounts, civil liability, and criminal charges depending on your jurisdiction. Card networks and processors log every attempt, declined or not. If you found this tool while looking for a way to get something for nothing, close the tab: there is no card number on the internet that will do that, and trying will only hurt you. Build something great instead, and use these test numbers the way they were meant to be used: to make your checkout code bulletproof.

For development and testing only. These are not real card numbers and cannot be used for real purchases.