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

REST API that validates card numbers using the Luhn algorithm. Built with Node.js, TypeScript, and Express.

Aplicación web que permite a un usuario validar el número de una tarjeta de crédito y oculta todos los dígitos excepto los últimos cuatro.

Card Validation en Super Cat, la pantalla muestra el registro y validación de tarjeta basándonos en el algoritmo de Luhn.

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.

E-commerce Bookstore android application

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

REST API that validates card numbers using the Luhn algorithm and detects card type (Visa/Mastercard)

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

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