Guides
Guides on QR codes, short links and UTM tracking
Five guides on QR codes, short links and UTM tracking. Each one names its sources and says plainly which numbers we measured ourselves and which we did not.
Last reviewed 27 October 2026 by the CTAurl team
Pages in this section
What is a dynamic QR code?
A dynamic QR code can be repointed after printing. How the redirect works, when a static code is the better choice, and the risk to check before a print run.
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How to make a restaurant menu QR code
One QR code per table, printed to scan in dim light, checked for stickers, and updated without reprinting the tent cards.
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QR code print size, quiet zone and logo limits
We rendered and decoded QR codes at every error-correction level. The logo and quiet-zone limits we measured, the method, and what a software test cannot tell you.
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A UTM naming convention that keeps reports clean
Google Analytics reports "Instagram" and "instagram" as two sources. A one-page naming convention keeps each campaign in one report row.
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What happens to printed QR codes when you stop paying?
What CTAurl does when you cancel, where provider terms differ, and five questions to ask any provider before a print run.
Learn moreFrequently asked questions
Who writes these guides?
The CTAurl team at Applied Gravity Limited in Hong Kong writes these guides. Each guide names its sources, and the print guide reports a decoding test we ran ourselves, with the method and its limits. We revise the guides when the product or the facts change.