- Does my data leave this browser?
- No. The QR code is generated locally in this tab - nothing is uploaded, tracked, or stored on a server.
- Does this send the email automatically?
- No - scanning opens a draft in the phone's default mail app with the address, subject, and body pre-filled; the person still has to tap send.
- Do these QR codes expire?
- No. Every code here encodes your data directly (a "static" QR code), so it scans forever - there is no subscription or dynamic redirect that can be switched off later.