American Express Validator & Generator
The most advanced toolkit for verifying and generating American Express credit card numbers for testing and development purposes.
Card Validator
Instant Verification
Algorithm
Full Luhn Modulo 10 checksum support.
IIN/BIN
Extensive Amex prefix database.
Card Generator
Mass Generation Tool
Secure
No data is ever stored on our servers.
Fast
Real-time validation and generation.
Accurate
Updated IIN/BIN database for 2026.
1 What is an American Express Card?
American Express (Amex) is a multinational financial services corporation headquartered in New York City. Unlike Visa or Mastercard, American Express often acts as both the card issuer and the payment network. Amex cards are widely recognized for their 15-digit number format and their premium status in the global financial market.
2 How Amex Validation Works
Our Amex validator uses a multi-step verification process to ensure accuracy:
- IIN/BIN Verification: Checks if the number starts with the official Amex prefixes (34 or 37).
- Length Check: Ensures the number is exactly 15 digits long.
- Luhn Algorithm: Performs a Modulo 10 checksum to verify the mathematical validity of the sequence.
Frequently Asked Questions
Are these real Amex cards?
No. These are mathematically valid numbers generated for testing and development purposes. They do not have real funds or credit limits.
Is this tool free?
Yes, our American Express card validator and generator is 100% free to use for all developers and researchers.