QR codes, or Quick Response codes, are two-dimensional (2D) matrix codes designed to store data in both horizontal and vertical dimensions. QR codes differ from traditional barcodes in their structure and encoding method. Instead of encoding data horizontally, QR codes use a grid of pixels called "modules." QR codes, which are sometimes called 2D barcodes, are not bars but modules. QR codes have become widely used due to their capacity to store more information and the ease with which they can be scanned on smartphones and other devices.

What is a QR Code Generator?

A QR code generator creates QR codes from data (for example, a text or a website address). We offer a free QR code generator online: just type in your data and download your QR code as a high-resolution PNG or vector graphic (SVG, EPS). To make your QR code available to others, you can now print it or embed it on your website.

Can a QR Code be Edited/Changed?

Static QR codes have fixed data stored within their graphics. Once created and printed, their information cannot be altered. Any errors or typos in a printed static QR code are permanent, like mistakes in other media materials.

On the other hand, dynamic QR codes offer flexibility. Managed through platforms like QR-Server, these QR codes allow users to modify the destination address (typically a URL) even after printing. This feature is especially useful for adjusting marketing campaigns or rectifying mistakes, such as using an incorrect web address.

However, a crucial limitation exists: static QR codes cannot be converted into dynamic ones due to technical constraints. Hence, for projects requiring adaptability or frequent changes, it's advisable to use a QR management solution like QR-Server from the outset.

How to Read/Scan a QR Code?

To scan a QR code, one needs a barcode scanner or a smartphone complete with a camera. In addition, one needs a suitable reader application compatible with the QR code standard. Manufacturers offer QR code reader apps across various mobile platforms, often for free.

While many free QR code reader apps exist, their performance in terms of usability, scanning speed, and compliance with standards, especially when processing vCards, can vary significantly. To assist users, recommendations for some of the best QR code reader apps based on experience are provided:

For Android:

• Barcode Scanner (QR code link to Google Play)

• i-enigma (QR code link to Google Play)

• RedLaser (QR code link to Google Play)

For iOS:

• i-enigma (QR code link to App Store)

• RedLaser (QR code link to App Store)

For Other Mobile Platforms:

• i-enigma

The automotive industry invented QR codes. Toyota asked their supplier, Denso Wave to develop a barcode to safely and easily identify components. QR generators were originally used in industrial applications. Therefore, they had to be easily printable in form and size as well as legible when partially destroyed or dirty.