Credit Card Checker
Card Numbers
Format: card_number|MM|YY|CVV •
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Frequently Asked Questions
What does this CC checker do?
This tool validates credit card numbers using multiple checks including:
Luhn algorithm verification
Card length validation
Expiry date validation
CVV format verification
It helps determine whether a card is structurally valid.
What is the Luhn algorithm?
The Luhn algorithm is a mathematical checksum used to validate credit card numbers.
It works by:
Doubling alternate digits
Subtracting 9 if result > 9
Summing all digits
Checking if total is divisible by 10
What do Live, Die, and Unknown results mean?
Live
→ Passed validation + API check
Die
→ Failed validation or invalid
Unknown
→ Could not determine (API error / unsupported)
Does a valid card mean it is real or usable?
No. A valid result only means:
The card number format is correct
It passes mathematical validation
It does
NOT
confirm:
Real existence
Active status
Available balance
Is my data safe?
Yes. Your data is safe:
No permanent storage
No database logging
Processed temporarily for validation only
What format should I use for input?
Use the following formats:
card_number|MM|YY|CVV card_number|MM|YYYY|CVV
Multiple cards can be entered line by line.
Why is my card marked invalid?
A card may be invalid due to:
Incorrect length
Failed Luhn check
Expired date
Invalid CVV
Unsupported card type
Which card types are supported?
Supported networks include:
Visa
Mastercard
American Express (Amex)
Discover
JCB
Diners Club
UnionPay
Maestro
Mir
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