The Complete Payment Testing Toolkit
Building payment integrations requires more than just code — you need proper test data. ToolSphere offers **4 specialized tools** that cover every aspect of payment development and testing, from generating card numbers to getting matched billing addresses.
Tool 1: Test Card Generator
Generate Luhn-valid test card numbers that pass format validation without charging real money.
How It Works
Select a card network (Visa, Mastercard, Amex, Discover, JCB, UnionPay, Diners Club)
Choose quantity and expiry mode (random or custom)
Get valid card numbers with CVV and expiry dates
Copy individual cards or all at once
Supported Networks
Visa — starts with 4, 16 digits, 3-digit CVV
Mastercard — starts with 51-55, 16 digits, 3-digit CVV
American Express — starts with 34/37, 15 digits, 4-digit CVV
Discover — starts with 6011/65, 16 digits, 3-digit CVV
JCB, UnionPay, Diners Club — region-specific formats
Try the Test Card Generator →
Tool 2: Card Validator
Validate any card number using the Luhn algorithm and instantly detect the card network.
What It Checks
Luhn validity — mathematical checksum verification
Card network detection — identifies Visa, Mastercard, Amex, etc.
Length validation — correct digit count for the detected network
Format check — proper prefix matching
How the Luhn Algorithm Works
Starting from the right, double every second digit
If the doubled value > 9, subtract 9
Sum all digits
Valid if total modulo 10 equals 0
Try the Card Validator →
Tool 3: BIN Lookup
Enter the first 6-8 digits of any card to discover the issuing bank, card type, country, and more.
Information Revealed
Issuing bank — the financial institution behind the card
Card brand — Visa, Mastercard, Amex, etc.
Card type — credit, debit, or prepaid
Card level — classic, gold, platinum, business
Country & currency — where the card was issued
Use Cases
Fraud prevention — detect country mismatches
Payment routing — send transactions to the right processor
Analytics — understand your payment method demographics
Try BIN Lookup →
Tool 4: Test Card Address Generator
Enter a test card number and get a realistic billing address that matches the card's origin region.
How It Works
Paste your test card number
The tool auto-detects the card network
Generates a region-matched billing address with name, street, city, state, ZIP, country, and phone
Region Mapping
Visa → US addresses (San Francisco, New York, Chicago)
Mastercard → UK addresses (London, Manchester, Edinburgh)
American Express → Premium US addresses (Manhattan, Beverly Hills)
JCB → Japanese addresses (Tokyo, Osaka, Kyoto)
UnionPay → Chinese addresses (Shanghai, Beijing, Shenzhen)
Diners Club → European addresses (Paris, Berlin, Rome)
Why It Matters
Payment gateways use AVS (Address Verification Service) to match billing addresses with card regions. Mismatched addresses cause false declines even in sandbox mode.
Try Test Card Address Generator →
The Complete Workflow
Here's how to use all 4 tools together for payment testing:
**Generate** a test card number with the Test Card Generator
**Validate** it with the Card Validator to confirm it passes Luhn
**Look up** the BIN to verify the network and card details
**Get a billing address** by pasting the card into the Address Generator
**Use everything** in your Stripe, PayPal, or Braintree sandbox
Important Notes
All generated data is for **development and testing only**
Test card numbers are **not real** and cannot process live payments
All tools run **client-side** — no card data is sent to any server
Always use these with payment gateway **test/sandbox modes**