Credit Card Validator
Validate credit card numbers using the Luhn algorithm and identify card types
ℹ️
For Testing Purposes Only
This tool is designed for development and testing purposes. Never enter real credit card numbers. Use test card numbers provided by payment processors for development.
Card Number Validation
Spaces and dashes will be automatically removed
Validation Results
Enter a credit card number to see validation results
Batch Validation
Batch results will appear here...
Supported Card Types
💳
Visa
Starts with 4
Length: 13, 16, 19 digits
Example: 4532015112830366
🔴
Mastercard
Starts with 5
Length: 16 digits
Example: 5555555555554444
💚
American Express
Starts with 34, 37
Length: 15 digits
Example: 378282246310005
🧡
Discover
Starts with 6
Length: 16 digits
Example: 6011111111111117
💜
Diners Club
Starts with 30, 36, 38
Length: 14 digits
Example: 30569309025904
💛
JCB
Starts with 35
Length: 16 digits
Example: 3530111333300000
About Luhn Algorithm
How It Works
1. Starting from the rightmost digit, double every second digit
2. If doubling results in two digits, add them together
3. Sum all the digits
4. If the total is divisible by 10, the number is valid
Example Calculation
Card: 4532015112830366
Step 1: 4 5 3 2 0 1 5 1 1 2 8 3 0 3 6 6
Step 2: 4 10 3 4 0 2 5 2 1 4 8 6 0 6 6 12
Step 3: 4+1+0+3+4+0+2+5+2+1+4+8+6+0+6+6+1+2=55
Result: Not divisible by 10 (Invalid)
Features
- ✅ Luhn algorithm validation
- 🎭 Card type identification
- 📱 Real-time validation as you type
- 📦 Batch validation for multiple cards
- 🔄 Auto-formatting with spaces
- 📋 Test card numbers included
Use Cases
- 🧪 Payment form testing
- 🔧 E-commerce development
- 📚 Learning payment processing
- 🛡️ Input validation development
- 📊 Payment analytics testing
- 🎯 QA testing scenarios
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