Online Validators
Instantly validate credit cards, IBAN, VAT numbers, ISBN, EORI, BIC/SWIFT codes, and SSN. Free verification tools for financial, business, and personal identification numbers.
Use a Validator NowCredit Card Validator
Validate credit card numbers, check card type (Visa, Mastercard, Amex), and verify using the Luhn algorithm.
IBAN Validator
Verify International Bank Account Numbers (IBAN) for European and worldwide bank accounts. Check format and country code.
VAT Validator
Validate European VAT numbers (Value Added Tax). Check EU business tax identification numbers for compliance.
ISBN Validator
Validate book ISBN numbers (ISBN-10 and ISBN-13). Check if book identification numbers are formatted correctly.
EORI Validator
Verify Economic Operators Registration and Identification (EORI) numbers for import/export businesses in the EU.
BIC/SWIFT Validator
Validate Bank Identifier Codes (BIC) and SWIFT codes for international bank transfers. Check 8 or 11 character codes.
SSN Validator
Validate US Social Security Numbers (SSN). Check format and basic validity of 9-digit identification numbers.
Why These Validation Tools Are Essential
Ever sent money to the wrong account because of a typo? Or had a payment fail because of an invalid card number? These simple mistakes cost businesses millions every year. Our instant validators catch these errors before they happen—saving you time, money, and headaches.
What You Get with Our Validators
Prevent Payment Failures
Check credit card numbers and IBANs before hitting "send." Our validators use the same algorithms banks use—catching format errors, invalid checksums, and fake numbers instantly.
Stay Compliant
Verify VAT numbers before invoicing EU customers. Check EORI codes for customs declarations. Validate BIC/SWIFT for international transfers. Avoid compliance fines and delays.
Catch Errors Early
One mistyped digit in an IBAN can send €10,000 to the wrong account. Our validators spot these mistakes in milliseconds, before the money leaves your account.
Save Time & Money
Failed transactions cost $5–50 each to reverse. Compliance violations? Even more. Our free tools help you avoid these costs before they happen.
Real-World Use Cases
- E-commerce: Validate credit cards before charging customers, reducing payment failures and chargebacks
- International Wire Transfers: A friend tried sending €5,000 to Spain—one wrong digit in the IBAN, and it bounced back 3 days later with fees. Our IBAN validator would've caught it in 2 seconds.
- EU Business Transactions: Invoicing a German client? Validate their VAT number first. If it's wrong, you could face tax issues months later. EORI codes? Essential for Brexit customs—get them right the first time.
- E-commerce & Publishing: Listing books online? Invalid ISBN numbers mean your books won't show up in searches. Amazon, Google Books—they all rely on correct ISBNs for cataloging.
- Payroll & HR: SSN format validation helps catch typos during employee onboarding. It won't tell you if the SSN is real (only the SSA can do that), but it'll spot obvious mistakes.
Your Questions, Answered
Is this really free? What's the catch?
Yep, 100% free. No hidden fees, no "freemium" limits, no signups. We make money from ads (check the banner above), so you get free validators. Use them all you want—validate a thousand IBANs if you need to.
How does the credit card validator actually work?
It uses something called the Luhn algorithm—the same math your bank uses. Every credit card has a "check digit" calculated from the other numbers. If someone makes up a 16-digit number, there's only a 10% chance it'll pass this test. But here's the important part: This only checks if the format is valid. It doesn't tell you if the card is active, stolen, or has money on it. Only the actual bank knows that.
Can I validate any country's bank account?
Yes, our IBAN validator checks International Bank Account Numbers used in Europe and many other countries. It verifies the country code, length, and checksum. For international transfers, also validate the BIC/SWIFT code to ensure the bank identifier is correct.
Is my data safe when using these validators?
Absolutely. All validation happens in your browser using JavaScript—no sensitive data is transmitted to our servers. We do not store, log, or share any numbers you validate. Your privacy and security are our priority.
What if a validator says my number is invalid?
If a validator reports an error, double-check the number for typos. For critical numbers like IBAN or VAT, contact the issuing authority (bank or tax office) to verify. Our validators check format and checksums but cannot confirm if an account or registration is currently active.
Check Your Numbers Instantly
Ensure accuracy and compliance with our free validation tools. Validate credit cards, bank accounts, tax numbers, and more in seconds.