Credit Card Validator

About This Tool

So, you’ve got a credit card number and you’re not sure if it’s legit? Maybe it’s from a user sign-up form, or you’re testing a checkout flow and don’t want to waste time with fake data. That’s where a credit card validator comes in. It’s not magic—just a quick check to see if the number follows the right pattern and passes a basic math test (called the Luhn algorithm, if you care). It won’t tell you if the card is active or has money on it. But it’ll catch typos, fake numbers, and obviously wrong formats before you send them off to a payment processor. I built this because I got tired of seeing garbage card numbers slip through during testing. One extra digit, one missing space—suddenly your logs are full of failed charges. This tool runs in your browser, doesn’t store anything, and gives you a straight answer: valid or not.

Key Features

• Checks card numbers using the Luhn algorithm—no guesswork, just math.
• Supports all major card types: Visa, Mastercard, American Express, Discover, and more.
• Instant feedback—type a number and see the result in real time.
• No data leaves your device. Everything happens locally.
• Works on mobile, desktop, or tablet—no app needed.
• Handles spaces and dashes automatically. You don’t have to clean the input.
• Shows the card type (like Visa or Amex) if the number is valid.

FAQ

Does this tool actually charge the card?
Nope. It only checks if the number is formatted correctly and passes the Luhn check. It doesn’t connect to any bank or payment system. Think of it like a spell-checker for credit card numbers.

Can I use this for real transactions?
Not really. While it helps catch obvious errors, it won’t verify if the card is active, has funds, or is authorized for use. Always use a proper payment gateway like Stripe or PayPal for real charges.