What is the QR code good for?

Scanning QR codes is a means for confirming contacts' identities. That way, man-in-the-middle attacks can be effectively prevented: If you receive a message of a confirmed contact (i.e., verification level 3), you can be sure that it wasn't spoofed or read by a third party (provided said contact's device wasn't stolen or hacked). On top of that, scanning someone's QR code is a convenient way of adding them to your contact list without having to manually enter their ID.

Display your own QR code:

  • Android: Open the side drawer (by tapping the menu button in the top left corner on the main screen). Then, tap the QR code icon in the side drawer’s top right corner
  • iOS: Navigate to the “My ID” tab, and tap on the QR code
  • Windows Phone: Navigate to the “My ID” tab, and tap on the QR code

Scan a contact’s QR code:

  • Android: Side drawer > camera icon next to the QR code
  • iOS: Threema > My ID > camera icon in the top right corner
  • Windows Phone: Threema > “contacts” > QR-code icon in the toolbar at the bottom of the screen

If you are having trouble scanning a QR code, please make sure the camera is not too close (below 10 in/25 cm), which might prevent it from focussing.

Please note: The QR code of contacts should not be confused with the QR code of ID exports and the QR code used to connect to Threema Web.

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