CodeItBro

Credit Card Number Generator

Produce random, Luhn-valid credit card numbers for QA, demos, or sandbox testing. Choose networks, quantity, and formatting.

Test card numbers on demand

Create batches of Visa, Mastercard, Amex, or Discover numbers that satisfy the Luhn checksum. Perfect for QA testers, demo environments, or engineering sandboxes—never for real payments.

Generation settings

Pick networks, quantity, and formatting, then generate sample numbers.

Networks

Formatting

Networks selected: 2Total numbers: 0Format: Spaced groups

Validate an existing number

Quickly check the Luhn checksum and detect the network type.

Responsible usage

  • Use the generated numbers in QA, staging, or demo environments only.
  • They do not hold funds and cannot complete real transactions.
  • Follow PCI and company security policies when handling any real customer data.
  • Pair the numbers with obvious placeholder names (e.g., Test User) to avoid confusion.

Testing ideas

  • Automate checkout tests with separate Visa/Mastercard flows.
  • Verify UX for 15-digit Amex inputs vs. 16-digit cards.
  • Validate masked input, copy-to-clipboard, and client-side Luhn checks.
  • Include Discover to confirm wallet or BNPL integrations support it.

How It Works

The Credit Card Generator runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

  • No server interaction – data never leaves your device
  • Instant results since there is no network latency
  • Works offline once the page is loaded
  • Free to use with no usage limits

How to Use

1

Choose card networks

Select Visa, Mastercard, Amex, or Discover profiles you want to test.

2

Generate sample numbers

Pick how many per network and your preferred formatting style.

3

Copy, download, or validate

Export everything for QA or validate an existing number with the Luhn check.

Example Usage

A batch of formatted Visa and Mastercard samples for checkout testing.

Input
Visa + Mastercard · 3 each · spaced
Output
Visa · 4539 0388 4023 1234

Frequently Asked Questions

Are these real credit card numbers?
No. We generate random numbers that simply pass the Luhn checksum. They are for QA, education, or sandbox testing only.
Which networks do you support?
Visa, Mastercard, American Express, and Discover. Each follows its standard length and starting digits.
Can I format the numbers with spaces or dashes?
Yes. Switch between plain digits, grouped spaces, or dashed groupings to match your QA scenario.

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The Credit Card Generator is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.