7 Common QR Code Mistakes and How to Avoid Them

Dead Link Destination

The most common mistake: the linked page isn't ready or has been deleted. Discovering broken links after mass-printing flyers or posters means expensive reprints.

Prevention: Always scan-test on a real device before print submission. Don't delete linked pages while printed materials are in circulation.

Print Size Too Small

Making QR codes too small for design reasons prevents smartphone scanning. Data-heavy QR codes have dense modules that blur when printed small.

Prevention: Ensure at least 15mm per side. Shorten URLs to reduce module count for large data. Scan-test at actual print size.

Missing Quiet Zone

Trimming the white margin (quiet zone) to pack in design elements prevents scanners from recognizing QR code boundaries.

Prevention: Maintain at least 4 modules of margin on all sides. Add a white border if the background isn't white.

QR-Only Access on PC Media

Placing only a QR code on websites or PDFs viewed on PCs forces readers to photograph their screen with a phone.

Prevention: On PC-viewed media, include a clickable URL link alongside the QR code.

No Performance Measurement

Installing QR codes without tracking scan counts or conversions means no data for improvement.

Prevention: Add UTM parameters to URLs for analytics tracking. Dynamic QR codes provide direct scan count data.

Poor Placement

Placing QR codes too high, in dark areas, or behind glass makes scanning difficult. A QR code near the ceiling on a train ad is nearly impossible to scan.

Prevention: Place at eye level (120-150cm). Choose well-lit locations. Avoid glass reflection angles.

Not testing after printing

The failure of a code that displayed cleanly on screen not scanning once printed is surprisingly common. The cause lies in elements not apparent on screen, such as size reduction at print time, insufficient resolution, and the texture or surface reflection of the paper. To prevent this, it is indispensable to actually print on the paper and size you will use for the real thing and to try scanning on several smartphones. Noticing after printing in large quantities wastes both the cost and the time of reprinting. A bit of confirmation before distribution prevents a large loss later.

Being too elaborate with color and design

Trying to make a code stand out by making the color flashy, overlaying a large logo, or decorating the pattern can, on the contrary, make it unscannable. A QR code can be read correctly only when there is a light-dark difference of dark cells on a light background. A color scheme with weak contrast against the background, or decoration enough to cover the cells, hinders scanning. The wish for a stylish design is understandable, but first being reliably scannable is the top priority. After adding decoration, be sure to confirm scanning on several devices. Achieving both appearance and function requires verification.

Unclear Purpose

Adding QR codes with only "Learn more" gives no motivation to scan. Few people will pull out their phone without knowing what they'll get.

Prevention: Clearly state what scanning provides: "Get a coupon," "Watch how-to video," "Request free sample" - add action-driving text.