About QR Code & VietQR

Những điều cần biết về Mã QR và Viet QR

1. What is a QR Code?

A QR code is a type of two-dimensional barcode consisting of black and white squares that can encode hundreds of characters. Devices such as smartphones and tablets can quickly recognize and scan QR codes—hence the name “Quick Response” (QR).

2. How is a QR Code Used?

Due to the widespread use of smartphones, QR codes are commonly used in mobile marketing campaigns. Marketers use QR codes to link digital content such as websites, videos, PDF documents, photo albums, or contact information to printed materials like flyers, posters, product catalogs, and business cards.

3. How to Create a QR Code?

You can generate a QR code easily using a QR Code Generator in three simple steps:

1. Choose the function of the code.

2. Enter the content you want to display and customize the code with colors and a logo if needed.

3. Download the QR code and prepare it for printing.

4. Can QR Codes Be Customized?

Yes. Thanks to their high error tolerance, QR codes can be customized without affecting their scannability. You can change colors, add a company logo in the center, and modify the design of the code’s corners. Always test the QR code on multiple devices before officially using it.

5. What is the Difference Between Static and Dynamic QR Codes?

Dynamic QR codes allow you to edit content and track data even after printing. These codes use a redirect URL to guide users to the target content and can provide statistics such as scan counts, location, and access time. In contrast, static QR codes directly link to the content without tracking capabilities.

6. How to Track QR Code Scans?

You can track QR code scans by using a dynamic QR code, which connects to a provider’s server via a redirect URL. All real-time data will be stored in your account.

7. What to Consider Before Printing a QR Code?

Use high-resolution file formats such as JPG, PNG, EPS, or SVG. Vector formats like EPS and SVG are especially suitable for large print sizes without quality loss. Always test the QR code by scanning it before distribution.

8. Other Factors to Consider When Printing a QR Code

The QR code size should correspond to the amount of encoded information; more data requires a larger code. The minimum recommended size is 2 x 2 cm. Avoid placing the code on uneven surfaces to ensure optimal scanning.

9. How to Scan a QR Code

You only need a smartphone or tablet with a QR code scanning application. Open the app, point the camera at the code, and the content will appear within seconds. Choose an app based on its rating in the app store for the best experience.

10. How to Use QR Codes Effectively?

Think from the audience’s perspective—would they want to scan the code? Provide valuable and engaging content, optimize landing pages for mobile devices, and include a simple call-to-action like “Scan this code to learn more” to encourage engagement.

11. The History of QR Codes

QR codes were developed in 1994 by Denso Wave (a subsidiary of Toyota) in Japan to track components and facilitate logistics in automobile manufacturing. Today, QR codes are widely used in Japan and many other countries and have been standardized internationally. A unique feature of QR codes is their ability to be scanned even when up to 30% of the code surface is damaged or dirty.

12. Applications of QR Codes

QR codes can encode URLs, websites, videos, images, discount codes, forms, and various other types of content. Some content, such as event details, WiFi connections, or contact information, does not require an internet connection for use. You can place QR codes on websites, printed materials, products, and many other flat surfaces.