Are these real credit card numbers?

No. These numbers are entirely synthetic. They follow the correct prefix and length rules for each network and pass the Luhn checksum, but they are not tied to any bank account and cannot be charged.

What is the Luhn algorithm?

The Luhn algorithm (also called Mod 10) is a simple checksum formula used to validate credit card numbers. It helps detect accidental input errors. Every real card number satisfies this check, and so do the numbers generated here.

Can I use these for real purchases?

No. Payment processors verify numbers against actual issuer databases after the Luhn check. These test numbers will be declined at that verification stage.

Which prefixes does each network use?

Visa starts with 4 (16 digits). Mastercard starts with 51-55 (16 digits). American Express starts with 34 or 37 (15 digits). Discover starts with 6011 (16 digits).

Is any data sent to a server?

No. All generation happens in your browser using JavaScript. Nothing is transmitted or stored externally.

Fake Credit Card Number Generator

Name: Fake Credit Card Number Generator
Availability: InStock
Author: Nham Vu

Generate Luhn-valid fake credit card numbers for Visa, Mastercard, Amex, and Discover for testing and development — never usable for real transactions.

Generator Settings

Card Network

Quantity

Include CVV Include expiry date

For testing and development only. These numbers are not real and cannot be used for purchases.

Generated Numbers

Click "Generate Numbers" to start

Summary

Generate Luhn-valid fake credit card numbers for Visa, Mastercard, Amex, and Discover for testing and development — never usable for real transactions.

How it works

Select a card network (Visa, Mastercard, Amex, or Discover).
Choose how many card numbers to generate (1 to 20).
Click "Generate" to produce Luhn-valid numbers with matching CVV and expiry.
Copy individual numbers or copy the entire batch with one click.
Use the numbers in payment form tests or sandbox environments.

Use cases

Test checkout flows and payment forms without using real card data.
Validate front-end credit card input masking and formatting.
Populate QA databases with synthetic card records.
Verify Luhn-check logic in your own payment processing code.
Test card-type detection (Visa vs Mastercard vs Amex) in UI components.
Generate placeholder data for UI mockups and demos.
Check backend validation rules for card number length and prefix.
Train machine learning models on synthetic card data.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu