An SMS QR code opens the phone's messaging app with the number and message text already filled in. The person still has to tap send — nothing happens automatically, and nothing is sent without them seeing it first.
Good uses
Confirming a reservation with a fixed reply ("YES to confirm your 7pm table"), a feedback line that pre-fills "I'd like to report:", or a simple opt-in text for a promotion list. It removes typing, not consent.
Keep the message short
Our generator caps the message at 500 characters, but shorter is better — a message someone has to scroll through before sending feels like a form, not a QR shortcut. One sentence is usually enough.
It's not two-way automation
This isn't a chatbot or an auto-reply system. It just opens a draft. If you need automatic responses, you need a proper SMS platform — a QR code only gets someone to the compose screen.