QR Code Expiration: How Do You Make a Code Expire on Purpose?
Make a dynamic QR code expire on a date, after a number of scans, or both. We tested whose clock sets the date, what one scan really counts and how a code comes back.
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The holy temple of QR
Will a QR Code on a T-Shirt Still Scan When the Fabric Folds?
We simulated a fold across the same QR code in two places. See which images still scanned and what to check on a sample shirt before approving the print run.
All articles
Practical
Marketing
QR Code Call to Action: What to Write, and What the Phone Shows First?
Write what the person gets, in a verb and a benefit, then check the name the phone shows before the tap. Apple's own screenshots decoded, 12,000 images to measure the white space.
Tech
Password-Protected QR Codes: What Does the Password Really Protect?
A password on a QR code guards the short link, not the page behind it. We decoded the code image, read the locked page, fired wrong passwords and opened the page directly.
Tech
How Much Data Can a QR Code Hold Before It Stops Scanning?
A QR code can hold up to 7,089 digits. A web address needs a different encoding. We used 15,888 simulated images to test how much a 2, 3, 5 or 10 cm code can hold and still scan at different distances.
Use cases
Time-Based QR Codes: Can One Code Serve Breakfast, Lunch and Dinner?
One printed QR code, three menus: we tested time windows on three clocks at the same second, the switch minute, a window crossing midnight, and what diners see outside hours.
Design
QR Code With a Logo in the Middle: How Big Before It Stops Scanning?
We put 9,624 images through a barcode scanner: a centred logo can cover 12 to 18% of a QR code at level H, 4 to 10% at M. Why the usual 30% rule fails, and where to put the logo.
Practical
Do You Have to Pay for a QR Code? The Cases Where Free Wins
The code itself is free; what you pay for is the service behind it. The cases where a free static code does the whole job, and the four where paying makes sense.
Use cases
QR Code Tattoo: Will It Still Scan in Ten Years?
A tattoo is the one QR code you can't reprint. How big the squares must be, where to put it, which link to trust and how to test it before the needle.
Marketing
QR Code Tracking: What a Scan Tells You, and What It Never Will
A QR code tracks nothing: the link behind it does. What a scan really records, how far to trust each number, and what you will never learn from it.
Practical
Blurry QR Code: Read the One You Got, Fix the One You Made
A blurry QR code has lost the sharp edges of its modules. How to read one you received, and how to export yours so it never goes soft.
Practical
How to Print a QR Code That Actually Scans
Any printer can print a QR code. Whether it scans depends on the file, the black, the material and one decision you make before generating it.
Practical
Can Google Create a QR Code? Yes, in Chrome. Here Is the Catch
Chrome has a QR code generator built in. Where to find it on desktop, Android and iPhone, what the file really is, and when it stops being enough.
Design
Inverted QR Codes: Do They Scan? We Tested 7 Codes
White on black looks great and scans on your phone. Whether it scans on everyone else's is the real question. The standard, a scanner map and our 7-code test.
Practical
Static vs Dynamic QR Codes: Which One Still Works in Five Years?
One is permanent, the other depends on a vendor staying alive. Editing, tracking and five-year cost compared, so you can decide in a minute.
Tech
Micro QR Code: What It Is and Why Your Phone Probably Cannot Read It
A one-eyed QR code that holds 35 digits and that most phones cannot scan. What a Micro QR code is, the real size math, and what to print when space is tiny.
Practical
QR Code Minimum Size: How Small You Can Actually Go
0.8 x 0.8 in (2 x 2 cm) at arm's length, and even that moves. The distance chart, the module formula, and the 3-minute test before you print.
Practical
QR Code on TV: How to Scan It When Your Phone Won't
The TV shows a QR code and your phone sees nothing? The screen physics, the 60-second method, where each app hides its code, and the typed plan B.
Practical
Do QR Codes Expire? The Honest Answer and What Kills Them
The pattern never expires, but the service behind it can. The 14-day trap, the four kill switches, a two-minute check, and the recovery playbook.
Practical
QR code not scanning? Find the fault in two minutes
The three-step diagnostic, then every cause: contrast, quiet zone, size, print, dead links and expired free plans. With the fixes.
Practical
How to Scan a QR Code: iPhone, Android, Screenshots, Any Screen
Every way to scan a QR code: iPhone, Android, from a screenshot, off a TV or computer, and the fixes when nothing scans.
Tech
Sunrise 2027: What Brands Actually Have to Do, and by When
2027 is coming, but only one EU law actually mandates a QR code. The honest map of what is law, what is voluntary, and what it costs a small brand.
Tech
ChatGPT QR codes: create and manage QR codes with your AI
ChatGPT can encode a link in a QR code. Here's what to ask for, how to test the file, and when to use a dynamic code so you can change the link after printing.
Use cases
6 Wedding QR Code Ideas That Do More Than Photos
Most couples use a wedding QR code just for photos. Here are 6 ideas that put it to work: guestbook, cash fund, playlist, menu, and RSVP invitation.
Practical
Quishing: How a Fake QR Code Scam Drains Your Account
A QR code on a parking meter or in an email can lead to a fake payment page. Learn what to check before you enter a card number and how to protect the codes you display.
Marketing
How to Add a Tracking Pixel to a QR Code
A dynamic QR code can send an event to Meta, GA4 or Google Ads after the person scanning it agrees. See how to use those events to measure a print campaign or build an ad audience.
Marketing
QR Codes, the Communication Super-Heroes
They are small, clever, cute, and will conquer the world. No, not aliens. But almost. QR codes.
Practical
QR Code Business Card for Dummies
We don\'t want to be melodramatic, but it\'s a fact, the virtual is increasingly taking over from the Human.
History
The Fabulous History of QR Code
Ah, this famous QR code, the guardian of our data! It holds as much information as a member of the intelligence services. It carries up to 7000 numeric characters (that blows your mind, doesn\'t it?).
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