A museum label has space for a name and a date, not the painter's full biography, and a historic marker rarely explains everything about the building behind it. Linking either to its Wikipedia article closes that gap: point a phone camera at the QR code and the article opens in the browser, on any phone.
Wikipedia's own Tools menu can shorten an article address into a w.wiki link, and either that or the full address works here. Choose a permanent link when the exact version read matters, such as a quoted fact. Making the code costs nothing and gives control over its size, colour and a vector file for a sign maker.
How to put a Wikipedia article in a QR code
Open the article in the right language
Each language edition is a separate site: en.wikipedia.org and de.wikipedia.org hold different articles on the same subject. Pick the edition your readers actually use.
Choose the kind of link
The ordinary address follows the article as it is edited. For a fixed version, open Tools → Permanent link. For a shorter code, open Tools → Get shortened URL and copy the w.wiki link.
Paste it into the web address field
Titles with accents or non-Latin letters are copied in percent-encoded form, full of % signs, which makes a denser pattern. That is one more reason to prefer the w.wiki link.
Scan it on a phone
Check that the article opens in the right language and, if you linked one, at the right section.
Live article, permanent link or short link
The address you encode decides what readers see in five years' time.
The live article
en.wikipedia.org/wiki/Title. Readers get the current text, including later corrections. If the article is renamed, Wikipedia normally leaves a redirect behind, so the code keeps working.
A permanent link
The address with ?oldid= and a revision number, from Tools → Permanent link. It always shows that exact revision, which suits citations and coursework, though readers miss later improvements.
A w.wiki short link
From Tools → Get shortened URL. Short, run by Wikimedia itself, and it keeps the pattern small on a label.
Wikipedia QR codes in museums and on heritage markers
Museums, libraries and local history groups use Wikipedia codes because the article already exists, is maintained by other people and is free to read. The label can stay short while the code carries the detail.
A section link works well here: add # and the section heading to the address, with underscores for spaces, such as #Architecture, and the article opens at that point. If the local article is thin, improving it on Wikipedia first is better than fixing a link to a stub onto a permanent sign. Anyone can edit the article, so look at it now and then, especially before an event or an opening.
What the code contains
A standard https address on a wikipedia.org domain, or a w.wiki short link. No article text is stored in the pattern; the phone loads the page when scanned, so readers need a connection. Phones are sent to the mobile layout automatically, so there is no need to encode the en.m.wikipedia.org form.
https://en.wikipedia.org/wiki/Eiffel_Tower#HistoryLabel, marker and handout sizes
A museum label read from arm's length needs a code of about 25 mm, because visitors lean in. A marker on a building read from three meters needs around 30 cm, or place a smaller one at eye level beside the entrance. On a handout or worksheet, 20 mm is enough. Keep a clear border, and avoid glossy lamination under gallery spotlights.
Print it at least 20 mm (2.0 cm) wide
What goes wrong with Wikipedia QR codes
Linking the mobile address
The en.m. form works, but it makes a slightly longer code and forces the mobile layout on anyone who opens it on a computer. Use the standard address.
Encoding a search page
A link to Wikipedia's search results can change as articles are added and renamed. Link the article itself.
Forgetting who reads the sign
An English-only code at a site visited mostly by Spanish speakers makes people switch languages by hand. Print one code per language where it matters.
Static or dynamic for Wikipedia?
Wikipedia addresses are among the most stable on the web, so a static code is the natural choice: free, permanent and independent of any service in between.
Dynamic suits a long-lived sign where you might later want to send people to your own page instead, or a museum that wants to count scans per exhibit. Each scan is recorded with its time and device type, nothing about the visitor beyond that. A free account with a verified email is required, and 2 dynamic codes are free forever.
How dynamic QR codes workWhere Wikipedia codes are used
- A local history society adds codes to historic markers, each linking to the building's article.
- A teacher prints permanent-link codes on a worksheet so every student reads the same revision.
- A botanical garden labels its trees with codes to each species article.
- A conference speaker ends the talk with a code to a background article on the final slide.