How big does a QR code need to be?
The 1:10 rule of thumb is right, but only for short content. How reading distance, content and quiet zone fit together — with a calculator to try it out.
Guide
QR codes that work in everyday use
How big a code needs to be, why some free codes lead nowhere after the trial period and how to spot a fake one. This is what we learnt while building qrmacher.de. There is no sales pitch, because there is nothing to buy here.
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By kind of code
Five kinds have a page of their own with a generator, instructions and the questions that come up most often.
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Link QR code
Menu, review page, appointment booking: any web address, direct and without a redirect.
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vCard QR code
Name, phone and email in one code. The phone turns it into a contact.
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Location QR code
Opens the maps app at the right spot, with a street address or accurate to the metre.
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Wi-Fi QR code
Guests scan and they are online, without typing out a password.
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QR code for bank transfers
For invoices and donation appeals: the banking app takes over payee, IBAN and amount.
Which kind suits which purpose is set out in the overview on the home page: Which code for what