Email QR code generator
mailto:?subject=&body=
Encodes a `mailto:` link with subject and body. Scanning opens the phone’s mail app with a draft ready — the person still sends it.
How to make a email qr code
The subject and body have to be URL-encoded to survive, which is handled here; a hand-written mailto with a space or an ampersand in the subject truncates at that character and quietly loses the rest. Length is the practical limit: a long body makes a dense QR code, and mail clients differ in how much of a mailto body they accept, with some truncating around 2,000 characters. Keep the body to a short prompt: a reference number, a template opening line: rather than a full message. Note it opens the default mail app, so a phone with no mail account configured does nothing useful.
Questions
Yes. A hand-written mailto with a space or ampersand in the subject loses everything after it.
Keep it short. Some mail clients truncate around 2,000 characters, and a long body makes the code very dense.
No, it opens a draft. The person sends it.
No. The data is encoded in the pattern itself, so there is no redirect to go down and no account to lapse. A printed code works for as long as the paper lasts.
Nothing useful happens. That is a limitation of mailto rather than of the code.