QR Codes

What Really is a QR Code?

It’s is really quite simple. QR is short for QUICK RESPONSE.
No tapping in a long email address or a website URLs.
Aim your phone and BAM, you are there!

First we want you to know that you can QR codes online for FREE! But we also want you to know why it might not be the best choice! Learn the difference between static and dynamic QR codes. Most free QR codes are static, which means, once you set the link it cannot be changed. A dynamic QR code’s link can be changed as often as you wish. This means you can change the message page to which the QR takes you to as often as you wish.

There are other parameters that are available including size, shape, color and readability. One of the most important is ERROR CORRECTION.

Part of the robustness of QR codes in the physical environment is their ability to sustain “damage” and continue to function even when a part of the QR code image is obscured, defaced or removed.

There are 4 error correction levels used for QR codes, with each one adding different amounts of “backup” data depending on how much damage the QR code is expected to suffer in its intended environment, and hence how much error correction may be required:

  • Level L – up to 7% damage
  • Level M – up to 15% damage
  • Level Q – up to 25% damage
  • Level H – up to 30% damage

So here are the take-outs:

  • The lower the error correction level, the less dense the QR code image is, which improves minimum printing size.
  • The higher the error correction level, the more damage it can sustain before it becomes unreadable.
  • Level L or Level M represent the best compromise between density and ruggedness for general marketing use.
  • Level Q and Level H are generally recommended for industrial environments where keeping the QR code clean or undamaged will be a challenge.