Credit Card Number Validator.

Validate credit card numbers using the Luhn algorithm, detect card types, and generate test numbers for development.

Credit Card Validator

Test Card Numbers

About Card Validation

This tool uses the Luhn algorithm to validate credit card numbers and recognizes patterns for major card types. All validation is done locally in your browser.

Generated test numbers are valid for testing but cannot be used for actual transactions.

How it works

Four steps.

  1. 01

    Enter a credit card number or generate a test number.

  2. 02

    Get instant validation results and card type detection.

  3. 03

    View detailed error messages if the number is invalid.

  4. 04

    Use test card numbers for development and testing.

Features

Professional Validation Tool.

Comprehensive credit card validation with Luhn algorithm checking and card type detection.

  • Card Detection

    Automatically detects major credit card types including Visa, Mastercard, American Express, and more.

  • Luhn Validation

    Uses the Luhn algorithm to validate credit card numbers and detect input errors.

  • Real-time Validation

    Get instant feedback as you type with clear error messages and card type detection.

  • Test Card Generation

    Generate valid test card numbers for different card types for testing purposes.

FAQ

Questions.

Can't find an answer? Send us your question.

What is the Luhn algorithm?

The Luhn algorithm (also known as the "modulus 10" algorithm) is a checksum formula used to validate various identification numbers, including: Credit card numbers Canadian Social Insurance Numbers IMEI numbers National Provider Identifier numbers in the United States

How does credit card validation work?

Credit card validation involves several checks: Length check based on card type Pattern matching for card type identification Luhn algorithm validation Card-specific validation rules

Are the test card numbers real?

No, the generated test numbers are not real credit card numbers. They are: Valid according to the Luhn algorithm Follow correct card type patterns Safe to use for testing purposes Cannot be used for actual transactions

Which card types are supported?

The validator supports major credit card types including: Visa (13, 16, or 19 digits) Mastercard (16 digits) American Express (15 digits) Discover (16 digits) JCB (16 digits) Diners Club (14 digits)

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