Valid Luhn Algorithm

Test Card Generator

Luhn-validated numbers for dev & testing. No real transactions.

generator.tsx

constbrand=

constquantity=5;

Min: 1Default Limit: 50

constformat=

Ready|TypeScript React

Ln 5, Col 6

luhn.validate()

// Validate

Paste any card number to check Luhn validity and detect brand

validator.tsx

constcardNumber=

// Enter number

Waiting|LuhnValidator.ts

Ln 1, Col 0

PRO

Need More?

// Bulk generation for database seeding,
// load testing, and QA automation

$9.oneTime()

1,000+ Cards

count: 10000

All Formats

format: '*'

SQL Ready

db: true

Fake IDs

identity: true

Luhn Validated

Every number passes ISO/IEC 7812-1 checksum validation.

Dev-First

Built for QA, developers, and testers. Export to JSON, CSV, SQL.

Instant

No signup. Generate 50 cards with one click. Copy or export.

Safe

Cannot process real transactions. For dev environments only.

output.json

// JSON Export Structure
[
  {
    "number": "5453984807953662",
    "formattedNumber": "5453 9848 0795 3662",
    "brand": "mastercard",
    "cvv": "555",
    "expiry": "04/28",
    "expiryMonth": "04",
    "expiryYear": "28"
  },
  {
    "number": "373025078993801",
    "formattedNumber": "3730 250789 93801",
    "brand": "amex",
    "cvv": "4712",
    "expiry": "10/30",
    "expiryMonth": "10",
    "expiryYear": "30"
  }
  // ... more cards
]

What is CreditCardGen?

CreditCardGen.com generates Luhn-valid credit card test numbers for software development and testing. These numbers pass format validation but cannot be used for real financial transactions.

// Luhn Algorithm

The Luhn algorithm (mod 10) validates identification numbers like credit cards. Our generator ensures every number passes this check, making them suitable for testing payment forms, checkout flows, and API integrations.

// Supported Networks

Visa: 4xxx (16 digits)
Mastercard: 51-55, 2221-2720 (16 digits)
Amex: 34, 37 (15 digits)
Discover: 6011, 644-649, 65 (16 digits)

⚠ These numbers are for testing only. They will not work for real purchases and are not connected to any bank accounts.