Credit Card Validator

Validate any card number using the Luhn algorithm and combined BIN lookup to instantly verify the card scheme, issuer and mathematical integrity.

6011 •••• •••• 6789

Discover

4111 •••• •••• 1111

Visa

Luhn Pass

Issuer Detected

Offline Check

Validate a Card Number

What Is Credit Card Validation?

Credit card validation is the process of checking whether a card number follows the mathematical and structural rules defined by international payment standards. A valid card number doesn't mean the card has funds or is authorised — it simply means the number is well-formed and could belong to a real card.

Our validator runs the Luhn algorithm (also known as the "modulus 10" check) as well as a BIN lookup to identify the card's issuing bank and network. This is the same check that payment gateways perform before ever contacting your bank.

Because validation is performed entirely offline — no transaction is made and no gateway is contacted — the check is instant, private and completely free.

How the Luhn Algorithm Works

1Starting from the second-to-last digit, double every other digit moving left.
2If doubling produces a number greater than 9, subtract 9 from it.
3Sum all digits — both the doubled and unchanged ones.
4If the total is divisible by 10, the card number passes the Luhn check.

Instant Results

Validation runs entirely in the server with no external API call, so results come back in milliseconds.

No Data Stored

Card numbers you enter are never logged or saved. Each submission is processed and discarded immediately.

BIN Detection

The first 6–8 digits (the BIN) identify the issuing bank, card brand (Visa, Mastercard, Amex…) and card type.

All Major Networks

Supports Visa, Mastercard, American Express, Discover, JCB, Diners Club, UnionPay and more.

Educational

Ideal for developers building payment forms, students learning about card standards, and security researchers.

Developer Friendly

Test your checkout flow with standard test card numbers (e.g. 4111 1111 1111 1111) without hitting a payment gateway.

Frequently Asked Questions

Does a "valid" result mean the card is active and has funds?

No. Validation only confirms that the card number is mathematically well-formed (Luhn check passes) and matches a known card-network prefix. It says nothing about whether the account is open, has a positive balance, or is authorised for transactions. For that you would need a live authorisation request through a payment gateway.

Is it safe to enter my real card number here?

This tool performs an offline Luhn check and BIN lookup — no card number is stored, logged, or transmitted to any third party. That said, as a general security habit we recommend using test card numbers rather than live credentials whenever you are experimenting with any online validation tool.

What is a BIN and why does it matter?

BIN stands for Bank Identification Number — it is the first 6 to 8 digits of a card number. It uniquely identifies the issuing bank, card brand (e.g. Visa, Mastercard), card level (Classic, Gold, Platinum), and the card type (credit, debit, prepaid).

Which card networks are supported?

Our validator recognises all major card networks including Visa, Mastercard, American Express, Discover, JCB, Diners Club, and UnionPay.

Can I use this to verify cards for my e-commerce site?

You can use the same Luhn algorithm on your own server for client-side pre-validation. However, always integrate directly with a PCI-DSS-compliant payment processor so that raw card numbers never touch your own servers.

Are there standard test card numbers I can use?

Yes. Common test numbers include: 4111 1111 1111 1111 (Visa), 5500 0000 0000 0004 (Mastercard), 3714 496353 98431 (Amex), and 6011 1111 1111 1117 (Discover).