A simple web tool to validate numbers using the Luhn algorithm (commonly used for credit card, debit card, and other identification number validation).
- Luhn Algorithm Validation: Quickly check if a number is valid according to the Luhn formula
- Bulk Validation: Enter multiple card numbers (one per line) for batch checking
- Simple & Fast Interface: Clean web UI focused on ease of use
- Instant Results: Real-time feedback on valid/invalid numbers
- Helpful for Testing: Useful for developers working with payment systems and card processing
Try the tool online:
Luhn Checker: https://luhnchecker20250327211640.azurewebsites.net/
- Language: C#
- Framework: ASP.NET Core
- Frontend: HTML, CSS, JavaScript
- Hosting: Microsoft Azure App Service
- Enter a single number and click Generate (or use the bulk input field)
- Paste multiple card numbers (one per line)
- View validation results instantly, including any errors for invalid numbers
Perfect for developers, QA testers, and anyone working with payment integrations who needs a quick way to validate card numbers using the Luhn algorithm.
This project is open source. Feel free to use it in your own applications.
Made with ❤️ by ChuckleSan