Identify the card network and run the Luhn check

Identify the card network and run the Luhn check. Useful for developers and administrators checking data before an import, form submission or integration.

Identify the card network and run the Luhn check. See a clear result update immediately in your browser, with no account, upload or stored data to worry about.

How to use

  1. Enter the card number you want to analyse, without spaces or dashes.
  2. Click the identifier button to start detecting the network.
  3. Read the result, which shows the recognised network and the Luhn key status.
  4. Check that the number was entered correctly if the result seems unexpected.
  5. Use this information only to test a form or validate a format, not for a real payment.

Example

The sample input matches a common test number. After identification, the result shows the detected network and confirms whether the Luhn key is valid. This lets you check how the tool behaves before using it on other numbers.

Input

5555555555554444

Limits and formats

Where processing happens

The number analysis takes place in your browser. The number you enter does not leave your device and is not stored. No request is sent to an external service.

Frequently asked questions

What is the Luhn key?

It is a checksum used to detect typing errors in card numbers. If the key is valid, the number follows a mathematical formula. This does not guarantee that the card exists or is authorised.

Can I use a real card number?

Even though processing stays local, it is best to avoid real numbers if you do not need to. Use a test number or a fictional example to check how the tool works without risk.

Does the tool indicate if the card is expired?

No, the tool only checks the network and the Luhn key. It has no access to the expiry date, cardholder or card status. That information is not contained in the number alone.

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