Your data never leaves your device.
All computation runs entirely in your browser using JavaScript. No server involved. No data transmitted.
We never see, store, log, or transmit your card numbers. There is no database. There are no server logs containing card data.
No analytics scripts. No tracking pixels. No ad networks. No CDN that logs requests. The page loads and runs entirely on your device.
The Luhn validation library and BIN lookup tables are open source. You can audit every line of code that touches card numbers.