Credit-Card-Validator

Validate, Verify & Check Credit Card or Debit Card Number. The data you enter will not be saved.

How to use

Click here to start using the validator.

or access https://neterror.pw/credit-card-validator.

Features

Card Detection

The validator can tell you the card type by the code you enter.

Format Verification

The validator will check if your credit card number has the proper format. Your credit card number should look like this:

1234 5678 9876 5432

XXXX XXXX XXXX XXXX

Privacy

No data is being recorded. The code is completly open-source so you can make sure the credit card numbers you enter aren't stored anywhere.

Support

You can get free support on the Issues Page or you can access my website for livechat, Discord and e-mail support: https://neterror.pw/.

How it works

function checkLuhn(input) {
	var sum = 0;
	var numdigits = input.length;
	var parity = numdigits % 2;
	for(var i=0; i < numdigits; i++) {
		var digit = parseInt(input.charAt(i))
		if(i % 2 == parity) digit *= 2;
		if(digit > 9) digit -= 9;
		sum += digit;
	}
	return (sum % 10) == 0;
};
function detectCard(input) {
	var typeTest = 'undefined',
		ltest1 = 16,
		ltest2 = 16;
	if(/^4/.test(input)){
		typeTest = 'visa';
		ltest1 = 13;
	} else if (/^5[1-5]/.test(input)){
		typeTest = 'mastercard';
	} else if (/^3[4-7]/.test(input)){
		typeTest = 'amex';
		ltest1 = 15;
    ltest2 = 15;
  } else if(/^6(011|4[4-9]|5)/.test(input)){
		typeTest = 'discover';
	}
	return [typeTest,ltest1,ltest2];
}


$('input.cc').keyup(function(){
	var val = this.value,
      val = val.replace(/[^0-9]/g, ''),
		detected = detectCard(val),
		errorClass = '',
    	luhnCheck = checkLuhn(val),
		valueCheck = (val.length == detected[1] || val.length == detected[2]);
  console.log(valueCheck);
	if(luhnCheck && valueCheck) {
		errorClass = 'verified';
	} else if(valueCheck || val.length > detected[2]) {
		errorClass = 'error';
  }
  
	$(this).attr('class', 'cc ' + detected[0] + ' ' + errorClass);
});```