Card number has valid format
What this tool does
This tool checks if a credit card number is correctly typed by verifying its mathematical checksum. It supports common card types like Visa, Mastercard, and American Express. The check looks at the number structure and digits to ensure they follow the standard formula used by banks.
Please note that this is a local calculation only. It confirms the number is well-formed but does not check if the card is active, has funds, or exists in a bank system. A valid result means the number is likely not a simple typo, not that the card can be used.
Common uses
- Screening user input in checkout forms to catch typos before processing.
- Validating stored card details during account updates.
- Basic data hygiene in financial records to ensure number formatting is correct.
Input data
| Parameter | Required | Example | Description |
|---|---|---|---|
credit_card | Yes | 4024007151839544 | Enter the full card number as text (digits only). For example, '4024007151839544'. Spaces are ignored. If the input is not numbers, the check will fail. |
Output data
| Field | Description |
|---|---|
result | A yes/no indicator showing if the card number's checksum is valid. For example, 'True' if valid or 'False' if not. |