Credit Card Validator

About This Tool

Alright, so you’ve got a credit card number—maybe from a customer, maybe from a form, maybe you’re just testing something out—and you want to know if it’s legit. That’s where this validator comes in. It’s not flashy, it’s not trying to sell you anything. It just checks whether a credit card number follows the basic rules. Think of it like a bouncer at a club: doesn’t care who you are, just checks the ID. This thing uses the Luhn algorithm. Yeah, sounds fancy, but it’s just math. Every major card issuer follows this pattern, so if a number fails the check? Probably fake. Could also be a typo. But it’s a solid first pass. Don’t expect it to tell you the card’s balance, who owns it, or if it’ll actually go through. That’s not what this is for. It’s just a quick sanity check before you waste time processing something that’s clearly wrong.

Key Features

• Validates card numbers using the Luhn algorithm—no magic, just math.
• Supports all major card types: Visa, Mastercard, Amex, Discover, and a few others.
• Instant feedback. Paste or type, hit enter, and you’ll know in half a second.
• No data stored. Your numbers don’t get saved, logged, or sent anywhere. Privacy isn’t an afterthought here.
• Works offline once loaded. No need to stay connected after the page loads.
• Simple interface. No ads, no pop-ups, no “upgrade to premium” nonsense.

FAQ

Q: Will this tell me if the card is actually active or has funds?
A: Nope. This only checks if the number is formatted correctly. It can’t tell you if the card is active, expired, or has money on it. That requires a real payment processor and permission from the bank.

Q: Can I use this for bulk validation?
A: Technically yes, but don’t go pasting in thousands of numbers. This tool is meant for quick checks, not batch processing. If you’re handling large volumes, you’ll want a proper API or backend solution—this isn’t it.