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QR Code Scanner

Scan QR code online with our QR reader. QR code reader online easily scans a QR code with a webcam.

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About QR Code Scanner Online - Scan QR Code Online With a Webcam

Today, QR codes can be seen in newspapers, magazines, flyers, posters, etc. You can easily spot the QR codes around you. It lets you interact with the world using smartphones, tablets, or computers.

Every year, a large portion of the $5.5 trillion payments made via mobile went through a QR code on various apps in China. Our QR scanner online easily scans QR codes with a webcam.

What is a QR code scanner or QR reader?

A QR code scanner or QR reader is an optical scanning device able to read QR codes. Most smartphones and tablets have built-in QR code scanners in their cameras. However, you need a webcam to scan the QR code from pc. That means you can point your camera to a QR code and scan and read it.

You get immediate access to its content when you scan a QR code. The QR code scanner online can scan the QR code and helps open the website URL in your browser. Other actions might include storing the business card in your smartphone's business list, connecting to wireless, or performing any other action specified to that QR code.

How to use a QR scanner online?

Most smartphones and tablets have built-in functionality to scan the QR code. However, you can also download the apps available online for that purpose.

But, when scanning the QR code from a PC, it feels a little bit odd. But sometimes you have to do this. It doesn't make sense to pull out your smartphone or tablet to scan a QR code from your computer's screen and view it on a tiny device—especially when you have the big screen right before you. Thus it's preferable to use a QR code scanner online that easily scans QR codes with a webcam.

How to scan a QR code using a QR code scanner?

For scanning a QR code from your PC, the process is simple. Perform the following steps.

  • Open the QR Code Scanner - QR Reader.
  • The tool allows you to either upload the image or use the webcam (attached to your PC) to scan the QR code.
  • Point the webcam at the QR code to be scanned, and you're done.

Note: When you scan a QR code using our QR reader online, you will be asked to give our QR code scanner permission to access the webcam on your PC.

What is a QR code?

QR code means "Quick Response." It's a two-dimensional barcode readable by smartphones, tablets, and computers(having a webcam facility).

The QR code contains information accessible along two dimensions: horizontal and vertical. It has black squares and dots with various hazy patterns arranged in a squared grid on a white background. The information is extracted from those fuzzy patterns.

QR Codes may contain links (to websites, videos, or files), email addresses, text, phone numbers, vCards, and more.

Denso Wave invented the QR code in 1994. However, after its invention, it got famous because of its ability to store many data. You can encode 4296 alphanumeric characters in a single bar code.

What if the QR Code is not working?

Our QR code reader cannot read the code for several reasons.

  • Suppose you generated the QR code by yourself using a QR code maker. Check the entered data. Sometimes there are minor mistakes in the URL typing that damage the QR code.
  • Most QR codes contain a lot of information. Try to reduce that. It helps the QR code scanner to read the data better.
  • Remove the logo from the QR code and check if it helps.
  • The foreground must be darker than the background in the QR code. It is highly recommended to have the QR code in black color with white background.
  • Check the QR code size—the scanning distance and amount of data to be encoded matter.

How do I calculate the right size for my QR Code?

The formula to know the ideal size concerning scanning distance is as follows.

QR Code Size (width in inches or cm) = Scanning distance (in inches or cm) ÷ 10

Suppose you want a QR code for the flyer, and the distance between the flyer and the scanning device is 12 inches (one foot). Then the QR code minimum size will be 1.2 inches.

The formula to know the ideal size concerning the amount of data to be encoded is.

QR Code Size (width in inches or cm) = (Scanning distance (in inches or cm)* Number of rows and columns) /250

Here, the number of rows and columns of modules is determined by the Version Number.

  • Version 1 has 21 rows and 21 columns of modules.
  • Version 2 has 25 rows and 25 columns of modules.
  • ...
  • Version 40 has 177 rows and 177 columns of modules.

Version Number ranges between 1 to 40.

Usually, a dynamic vCard QR code has about 33 rows and columns of data. And if the scanning distance is 0.5 feet or maybe 6 inches. Then the QR code minimum size will be 0.8 inches.

Can a QR Code be hacked?

No one can hack the QR code. There are no security flaws; however, replacing the QR code with another is possible. Users would think that they are scanning the QR code of a trusted company, but it leads them to malicious content.

Or to create a QR code that leads to phishing or malicious content.

You must be careful before scanning the QR code. So you do not be the victim of these malicious contents.

Take the following measures to increase your QR code security.

  • Do not scan the QR code if you have any doubts.
  • Before scanning the QR code, ask yourself if the company looks legitimate or if the code design looks professional.
  • Most QR readers now display the link address before opening it in a web browser. Check the landing page, and make sure that the URL of the landing page looks authentic.
  • Check for tempering. Is the QR code on the flyer, product, newspaper, or magazine part of the original design? Or is it a sticker placed on the top?

How to generate a QR code for free?

Perform the following steps to create the QR code.

  1. Go to QR Code Generator.
  2. Provide all the necessary information needed to create a unique QR code. You can generate the QR code for a website, business, product, service, or private use.
  3. Select the image size. It is highly recommended to use 250 x 250 pixels.
  4. Select the error correction level.
  5. After filling in all the needed entries, click the "Generate" button.
  6. The tool will process the request and generate the QR code.
  7. You can either download the QR code or use the code snippet to integrate it on your website.

Looking for more Productivity tools on DNS Checker? Why do not you try our Credit Card Number Generator, CC Validator, Extract Text From Image, and Image Search Online? All the Productivity tools are top-notch and free!