*All random cards generated are structurally valid but have no actual balance and cannot be used for online payments or real transactions. Any attempt to use these test card numbers for actual purchases is strictly prohibited and illegal. For more details, visit our Terms of Service.
What is the advanced generator?
The standard generator fills the unknown digits of a BIN with random values. The advanced generator does the opposite:
you place x wildcards exactly where you want to control the pattern,
and it enumerates the possible numbers in order. This is useful for exhaustive tests, fuzzing checkouts, seeding test
fixtures and verifying how your system handles every variation in a range.
How to use it
- Enter a BIN of 6 or more digits.
- Append 2–4
xwildcards for the digits you want to enumerate. - Click Generate. The last wildcard becomes the Luhn check digit automatically.
- Copy the results from the generated cards page and paste them into your test suite.
| Pattern | Numbers generated | Use case |
|---|---|---|
| 414720xx | 10 | Quick sweep of the last two digits |
| 414720xxx | 100 | Parameterised test data |
| 414720xxxx | 1,000 | Bulk fixtures (maximum pattern size) |
Patterns with more than 4 wildcards are rejected to keep the browser responsive. For bulk random generation, use the standard generator with a large quantity instead.
FAQ
- Why does the last x become a check digit?
- Every card number ends with a Luhn check digit. The advanced generator calculates it for each combination, so all generated numbers are structurally valid.
- Can I mix x wildcards with random digits?
- Yes. Any digit you type is kept as-is; only the x positions are enumerated. This lets you pin down the beginning of the range while varying the rest.
- Are the generated numbers real cards?
- No. They are structurally valid test numbers with no balance. Never attempt real transactions with them.
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