If you just need to view the contents of a QR code, without installing any software, you can use this online QR bill code validation tool: https://www.swiss-qr-invoice.org/validator/

This tool formats the contents of an image containing a Swiss QR bill code into human readable output.

Requirements (package names in Debian/Ubuntu):

• coreutils (provides realpath)
• default-jre-headless (provides java)
• gawk

Usage:

$ ./swiss-qr-code-2-human.sh
Usage: ./swiss-qr-code-2-human.sh <path-to-image-containing-qr-code>

https://www.paymentstandards.ch/dam/downloads/ig-qr-bill-de.pdf

From page 23 on, the above document describes the Swiss QR Code format.

In a nutshell, the QR code contains UTF-8 plain text, CR+LF terminated lines. It contains various sections on fixed line positions, so upon looking up what the contents represent, they become more or less human readable. This awk script simply prepends the varios section with human readable designations. This should let you easily copy paste the output.

For testing the script, try the following sample Swiss QR Bills: https://www.paymentstandards.ch/dam/downloads/muster-qr-zahlteile-de.zip

Further information, including the above documents, can be found at: https://www.paymentstandards.ch/de/home/software-partner.html