Nothing you check here is sent anywhere. Open your network tab
and watch.
Drop a receipt file here, or open a receipt link.
Published key (optional)
This page is static and stores nothing. The receipt travels in the part of
the address after the #, which browsers never send to a server —
so whoever hosts this page cannot see what you are checking.
Verify from a copy you trust. If someone hands you a receipt and the
page that checks it, they can make the page say anything.