Credit Card Validator

Validate credit card numbers (Luhn algorithm)

Note: This validates format only, not if the card is active.

What is Credit Card Validator?

The Credit Card Validator is a free online tool that checks whether a credit card number is valid using the Luhn algorithm and identifies the card type (Visa, Mastercard, American Express, Discover, and more), all processed locally in your browser. When building e-commerce applications, payment forms, or checkout flows, developers need to validate card numbers on the client side before submitting them to a payment gateway. The Luhn algorithm is the industry-standard checksum formula used by all major card networks to detect typos and invalid numbers. This tool is designed for development and testing purposes — it validates the mathematical format of card numbers without processing any real payments. Use it to test your payment form validation logic, verify Luhn algorithm implementations, and check test card numbers from payment providers like Stripe and PayPal.

Why Use DevBench Credit Card Validator?

DevBench Credit Card Validator runs entirely in your browser — your data never leaves your device. No sign-up, no limits, no watermarks, completely free forever.

How to Use Credit Card Validator

  1. Enter credit card number (with or without spaces)
  2. Click "Validate" to check card validity
  3. View card type (Visa, Mastercard, Amex, etc.)
  4. See validation result using Luhn algorithm
  5. Use for testing payment forms and validation

Examples

  • Validate Visa card: 4532015112830366
  • Validate Mastercard: 5425233430109903
  • Validate Amex: 374245455400126
  • Test payment form validation
  • Validate card number format

Use Cases

  • Testing payment form validation
  • Validating card number format
  • Testing e-commerce checkout flows
  • Validating card numbers in development
  • Testing payment gateway integration
  • Validating card type detection
  • Testing card number input masks
  • Validating Luhn algorithm implementation
  • Testing payment processing logic
  • Validating card numbers for QA testing

Frequently Asked Questions

What is Luhn algorithm?

Luhn algorithm is a checksum formula used to validate credit card numbers and detect typos.

Does it charge my card?

No! This only validates the number format. No actual payment processing occurs.

Is it safe to enter my card?

All validation happens locally in your browser. However, never enter real card numbers on untrusted sites.

What card types are supported?

Supports Visa, Mastercard, American Express, Discover, Diners Club, JCB, and more.

Can I use test card numbers?

Yes, use test card numbers from payment gateways (Stripe, PayPal) for development testing.