Provide check digit algorithms and calculators written in Go

A C# library for validating and generating credit card numbers.

Generation and verification of card numbers using Luhn's algorithm.

A Java library for generating mathematically-valid credit card numbers for software testing. The API provides customizable criteria for generation, and is extensible to apply to any payment card type which uses Luhn validation (not limited to just credit cards).

A .net library to identify credit card number and cvv

Python library to generate and validate credit card numbers. Features a fast, offline BIN lookup using a local database. Zero dependencies, no API keys needed. Perfect for generating test data.

🔒 An easy-to-use check digit library for data validation

This Python code scrapes Google search results then applies sentiment analysis, generates text summaries, and ranks keywords.

Minimal, zero-dependency implementation of the Luhn Algorithm for PHP.

A small guide on credit card security, and ways hackers exploit them

Fake credit card generator and validator. This is only meant for educational purpose.

Credit Card Checker And Generator Using Luhn Algorithm

Simple validator for identification numbers based on Luhn algorithm

Card & BIN Tester — a polished Flask app showcasing card generation, BIN lookup and live Stripe test validation. Clean UI, responsive design, and realtime progress reporting make it ideal for security students and devs who want to learn how payment validation works — strictly for legal and educational purposes.

PHP implementation of the Luhn algorithm.

A full TypeScript EAN, UPC, IMEI, EID, ISBN & card validation tool

Helper classes to calculate and validate ckecksums.

A better and safer way to display your primary keys in urls or in your app

Fastest JavaScript implementation of the Luhn algorithm

Luhn (Modulo 10 or mod 10 algorithm) for PHP