💳 Generate and validate credit card information easily with this professional tool designed for secure testing and development purposes.

🚀 High-performance SIMD-optimized Luhn algorithm validator for payment card numbers. Zero-allocation, multi-core ready with SSE2/AVX2 acceleration. Perfect for PCI DSS compliance and high-throughput payment processing.

E-commerce Bookstore android application

💳 Offline BIN database with 9,000+ verified entries. No API required! Fast SQLite lookup for credit/debit card validation.

Welcome to the UPI QR Generator! This slick React web application provides a user-friendly interface to input credit card details and a mobile number, validates the information, and then cleverly generates a UPI QR code or a direct UPI payment link.

A simple function that calculates the Luhn checksum for a given number

card-precheck is a lightweight JavaScript utility for validating credit and debit card numbers before sending them to a payment gateway.