ISBN Validator
Validate ISBN-10 and ISBN-13 book numbers.
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Validate email address format and syntax.
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Validate credit card numbers using the Luhn algorithm.
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Detect the card network (Visa, Mastercard, Amex, etc.) from a card number.
Phone Number Validator
Validate phone numbers for correct format by country.
Phone Number Formatter
Format phone numbers to national and international standards.