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Each of these is a QR Code with a particular kind of text inside. The camera app can scan the symbol and returns that text. It does not join a Wi-Fi network, open a link, save a contact, or pay.

• EPC QR Code (GiroCode, SEPA)

  The EPC QR Code lets you pay an invoice by scanning instead of typing an IBAN. It holds the payee name, IBAN, amount and reference in a short text block, and your banking app fills in the transfer for you to confirm.

• Swiss QR Code (QR-bill / QR-Rechnung)

  Swiss invoices carry a QR code with a small Swiss cross in the middle. It contains everything needed for the payment, from the IBAN to the reference number, and replaced the old orange and red payment slips in 2022.

• WiFi QR Code

  A WiFi QR code stores the network name, security type and password in one short line of text. Point a phone camera at it and the device offers to join the network, with no typing of long passwords.

• vCard / MeCard contact QR Code

  Contact QR codes put a digital business card into a square code. vCard is the full, standard address-book format, while MeCard is a shorter notation that keeps the QR code small and easy to scan.

• URL QR Code

  The most common QR code simply contains a web address. Scanning it opens the page in the browser, which is why it is important to preview the link first and make sure it leads where you expect.

• Payment QR Codes (EMVCo, Pix, UPI)

  Around the world, shops and friends share QR codes to receive money. Brazil's Pix uses the EMVCo tag format, India's UPI uses a upi:// link, and in every case your own banking or wallet app shows the payee before you confirm.

• SMS QR Code

  An SMS QR code prepares a text message for you: the recipient's number and the message body are filled in, and you only press send. It is often used for opt-in campaigns and service requests.

• Email QR Code

  An email QR code starts a new message for you, complete with recipient, subject line and even body text. Nothing is sent until you tap send in your mail app.

• Phone number QR Code

  A phone QR code holds a tel: link with a phone number. Scanning it brings up the dialler with the number ready, so callers do not mistype it.

• Geo location QR Code

  A location QR code stores a place as coordinates, using the geo: format or a regular map link. When scanned, it shows the exact spot on a map and can start navigation.

• Calendar event QR Code (vEvent)

  An event QR code carries a short iCalendar entry with title, start and end time and location. Scanning it lets people save the date to their calendar instead of copying details by hand.

• Plain text QR Code

  A plain text QR code simply stores words or numbers. Nothing opens automatically; the scanner just shows the text, which works offline and is handy for notes, serial numbers or puzzles.