Credit Card Generator

Credit Card Generator - Test Numbers and Luhn Validator

This tool generates fully synthetic test cards. It never creates real payment instruments and all values ​​are for demonstration purposes only.

Thanks to the deterministic seed, whitelisted prefix and built-in Luhn validator, you can quickly prepare reliable data for QA, demo and training scenarios. It's simple and safe.

How the

tool works The engine creates a number based on the selected brand and length rules, and then calculates the check digit using the Luhn algorithm. The whole thing works in test mode and is not used for transactions.

The generated record includes the card network, number, name and surname in the given language location, expiration date and CVV with the appropriate length for the given network. This is a complete set for interface and backend testing.

Key Features at a Glance

• Support for popular networks: Visa, Mastercard, American Express and Discover. Simple and predictable.
• Single and batch mode with quantity limit to easily feed test tables or mocks. This saves the team time.
• Number formats: string and spaced grouping, including the 4-6-5 rule for Amex. Readability matters.
• Export to CSV and JSON without additional dependencies. Just one click.
• Luhn validator with brand detection by prefix. Verification is immediate.
• Seed for repeatability and optional BIN prefix from the environment whitelist. Control is on your side.

Each feature is designed with QA and CI flows in mind. This tool is not for production use in payments.

Who and when to use

• QA and testers who need stable, predictable data for automatic and manual tests. This is a common need.
• Frontend and backend developers verifying form validations, masks, logic and Luhn rules. Fast and safe.
• Product and analysts, preparing demos, mockups and payment UX training. Zero risk of data leakage.
• Trainers and educators who want to safely demonstrate payment flow. This is the perfect training material.

Do not use this generator for real payments. Such use is prohibited and pointless.

Quick start - first data generation

1. Select the card network in the Network field and set the number of records. It takes a few seconds.
2. Set the number format and possibly the location of names and repetition seeds. You will gain predictability.
3. If you must, provide your own BIN prefix allowed by the environmental whitelist. If it is not on the list, the operation will be blocked.
4. Click Generate or Generate Multiple, and then use CSV Export or JSON Export. Integration becomes simple.

In the preview you will see the card with the number, date and CVV and a simple QR code with the payload. It's convenient for presentations.

Safety and legality of use

The tool works only on synthetic data and does not enable any real authorization. This is important information.

We respect good testing practices, use a whitelist of prefixes and clear messages, and the user is informed that this is a test only and not for payment. Use in test and demo environments.

Seed and repeatability of results

One of the key features of the generator is the ability to set the seed parameter. Thanks to it, each session can be fully deterministic. This means that by providing the same seed and the same settings, you will receive identical cards in every attempt.

This feature is especially useful in automated tests where repeatability is important. For example, you can write a test in Cypress or PHPUnit that checks card number masks, and thanks to seeds you will always get the same result, eliminating randomness. This is a huge convenience for QA and development