Industry guide
QR codes for libraries
Libraries get the most from QR codes on shelf ends linking into the catalogue, on event posters, and on a WiFi card at study desks. Because patron privacy is a professional duty, generate codes client-side and never upload the WiFi password or reading-list URLs to a third-party server.
Shelf ends: link the class mark, not the item
The mistake is linking a specific item record — items get borrowed, withdrawn and moved. A shelf-end code should open a canned catalogue search for that classification range, so it stays true as stock rotates. The code on the local-history bay links "everything we hold at this class mark", including the ebooks and digitised material a browser of physical shelves would otherwise never find. That physical-to-digital bridge is the highest-value code in the building.
Shelf ends are read from 30–50 cm, so 3–5 cm of code on matt stock is enough.
Patron privacy is the design constraint
Libraries have a long professional tradition of not recording what people read. Two practical consequences:
- Generate codes client-side. A WiFi code built in the browser means the network password never reaches a third-party server.
- Avoid link shorteners and dynamic-QR providers on catalogue links — they log every scan, which quietly creates a record of reading interest your library never chose to keep.
What earns a code
| Placement | Links to |
|---|---|
| Shelf ends | Canned catalogue search for the range |
| Study desks | WiFi card, printing instructions |
| Events poster | Booking page plus a calendar code |
| Displays | Digitised collection items |
| Entrance | Opening hours, renewals, membership signup |
A good fit for a quiet room
Scanning is silent: no app to install, no sound, no staff interaction needed. For renewals and catalogue lookups it lets patrons self-serve without breaking the room. The usual print checklist applies — matt stock, black on white, quiet zone intact.
FAQ
What should a library shelf QR code link to?
A saved catalogue search for that classification range, not an individual item record. Items move and get withdrawn; a class-mark search stays accurate for years and surfaces ebooks and digitised material alongside the physical stock on the shelf.
Are QR codes a privacy risk in libraries?
The code itself is inert, but the destination matters. Shorteners and dynamic-QR providers log each scan, creating a record of reading interest. Use direct links to your own catalogue and generate codes client-side so nothing about patrons or your network leaves the building.
How big should shelf-end QR codes be?
Shelf ends are read from about 30–50 cm, so a 3–5 cm code comfortably clears the 10:1 size-to-distance rule. Print black on white matt stock and keep at least four modules of quiet zone on every side.
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