How to Create a QR Code That Actually Works

What does a QR code contain?

A QR code is simply text encoded in black and white squares. Most often, that text is a web address: the phone reads it with the camera and offers to open it. The longer the text, the more tiny squares the code has, and the harder it is to read from a distance or on a small surface.

That is the first reason to put a short link in a QR code instead of a long address: a simpler code, so a more reliable one.

What size should a QR code be?

Printed, a QR code must stay readable where people scan it. Common rules of thumb: allow at least about 0.8 in (2 cm) per side for a code read up close, like on a business card, and count roughly ten times the code’s width as the reading distance. A 4 in (10 cm) code can be read from about 3 feet (1 meter).

These figures are common-sense guidelines, not an absolute standard: print quality and code complexity matter. On a poster seen from afar, go big. And in every case, run a real test.

Which contrast and colors should you choose?

QR code readers look for dark squares on a light background. The safest choice is black, or a very dark blue, on white.

• Avoid light codes on a dark background: some readers do not recognize them.
• Avoid colors that are close to each other, or yellow and light gray on white.
• Keep an empty margin all around the code, at least four small squares wide. Do not put text or a border on it.
• Do not distort the code by stretching it: it must stay square.

How do you test a QR code before printing?

A test takes two minutes and saves you from throwing away a whole print run.

• Scan the code on screen with an iPhone and an Android phone, using only the camera, with no special app.
• Print one copy at the real size, on the real paper, and scan it from the planned distance.
• Check that the landing page loads fast and is readable on mobile.
• Test in real conditions: low light, a glossy or curved surface, glare.

Should you use PNG or SVG for print?

A PNG file is a grid of pixels: fine for a screen or a small document, but it gets blurry when enlarged. An SVG file is a vector drawing: it stays sharp at any size, which suits posters, storefronts and print shops. For professional printing, ask for or provide SVG.

How do you create a QR code with Qlynk?

Every Qlynk link has its own QR code, generated right in your browser. It contains the short link with a marker that lets Qlynk count scans separately from clicks. The Free plan provides it as a PNG; the Pro plan adds SVG and colors. Because the code contains the short link, you can change the destination after printing without redoing the material.

Which mistakes ruin a QR code?

Most failures come from layout choices rather than technology. A QR code stuck on a shop window reflects light, a code on a curved surface (bottle, cup) gets distorted, and a code placed over a busy photo loses its contrast.

Place the code at eye level, on a flat, matte surface. Always add next to it what the visitor will get by scanning, for example “Scan to see the menu.” People scan more willingly when they know why. And plan for those who cannot scan, such as the short address written out in full under the code.

Last, never put your QR code on a medium you do not control, or on stickers that are easy to peel off and replace. Scammers sometimes stick fake codes over real ones. A code on a secure, clearly visible surface that you check regularly avoids that risk. If you put codes in public places (shop window, booth, furniture), go check them from time to time, and rescan them after each event. This small check takes a minute and protects your customers and your image.