You can scan QR codes on your computer using your webcam, a screenshot tool, or by typing the URL manually

A QR code is a square barcode that holds information — usually a website link, but sometimes contact details, WiFi passwords, or payment information. Your computer can read QR codes in three main ways: with your built-in webcam and free software, by taking a screenshot and uploading it to a decoder, or by opening the link directly if you already know where it points. The method you choose depends on what device you have and whether the QR code is in front of you or on your screen.

Most people think QR codes are phone-only, but computers have been able to read them for years. You do not need to buy anything or install complicated software — your browser and a free tool are usually enough.

Key Takeaways

  • Windows 10 and 11 computers can scan QR codes using the built-in Camera app and the Windows Magnifier tool without downloading anything extra.
  • Mac computers can use the native Preview app to scan QR codes from screenshots or the Continuity Camera feature if you have an iPhone nearby.
  • Any computer can upload a screenshot of a QR code to a free online decoder website, which will show you the link or information inside.
  • Google Chrome and other browsers can read QR codes directly if you right-click an image and select the scan option, or use a free browser extension.
  • Once decoded, a QR code usually opens a website, but it can also contain text, phone numbers, or WiFi details that you can copy and use.

Scanning a QR code with your Windows camera and Magnifier

Windows 10 and 11 have a built-in tool called Magnifier that can decode QR codes using your webcam. Open the Magnifier app by pressing the Windows key and typing "Magnifier," then click the result. In the Magnifier window, look for the camera icon in the toolbar at the top. Click it, and your webcam will set up.

Point your webcam at the QR code — hold it steady and make sure the entire code fits in the frame. The Magnifier will automatically detect the code and display the information or link it contains. If the code leads to a website, you can click the link directly from the Magnifier window. This method works best when the QR code is printed or displayed on another device in front of you.

Using Mac Preview or Continuity Camera to read QR codes

Mac computers can scan QR codes through the Preview app if you have a screenshot or image of the code saved. Open Preview, go to Tools in the menu bar, and select "Look Up QR Code." A window will open asking you to select an image file. Choose the screenshot or image containing the QR code, and Preview will decode it and show you the link or text inside.

If you have an iPhone or iPad nearby, you can use Continuity Camera to scan a physical QR code without taking a screenshot first. Open any app on your Mac that accepts images or text — like a browser or Notes — and look for a camera icon. Click it, select "Take Picture with iPhone," and point your iPhone's camera at the QR code. The Mac will receive the scan and decode it automatically.

Uploading a screenshot to a free QR code decoder website

Any computer can decode a QR code by uploading a screenshot to a free online decoder. Take a screenshot of the QR code (use Print Screen on Windows or Command-Shift-4 on Mac), then visit a decoder website like QR-Server.com, ZXing.org, or Decode QR Code. These sites are free and do not require you to create an account.

Click the upload button, select your screenshot file, and the decoder will show you what the code contains — usually a URL, but sometimes plain text, contact information, or WiFi credentials. Copy the link or information and use it as needed. This method works even if your computer does not have a working webcam or if the QR code is very small or damaged.

Scanning QR codes directly in your web browser

Google Chrome and some other browsers can scan QR codes without extra software. If you see a QR code image on a webpage, right-click it and look for an option that says "Search image with Google Lens" or "Scan QR code." Click that option, and the browser will decode the code and show you the result.

If your browser does not have this feature built in, you can install a free browser extension. Search your browser's extension store for "QR code scanner" and choose one with good reviews — popular options include QR Code Reader and QR Scanner. Once installed, the extension adds a button to your toolbar. Click it, allow access to your webcam, and point it at the QR code. The extension will decode it and open the link or display the information.

What to do after you decode a QR code

Once your computer decodes a QR code, the next step depends on what the code contains. If it is a website link, your browser will usually open it automatically, or you can click the link in the decoder window. If the code contains plain text — like a WiFi password or contact details — you can copy it and paste it where you need it.

Be cautious with QR codes from unknown sources, especially if they come from emails, text messages, or printed materials you did not request. Hover over the link before clicking to see where it actually points. If the URL looks suspicious or does not match what the QR code was supposed to link to, do not open it. Scammers sometimes use QR codes to direct people to fake websites that steal passwords or install malware.

Troubleshooting when a QR code will not scan

If your computer cannot read a QR code, the code itself may be damaged, too small, or printed at a low contrast. Try taking a clearer screenshot, moving closer to the code, or adjusting the lighting if it is a physical code. If you are using your webcam, make sure it is clean and that you have given the app permission to access it — check your privacy settings in Windows or Mac.

If the decoder shows an error, try uploading the screenshot to a different decoder website — some are more tolerant of damaged or unusual codes than others. If the code opens a link that does not work, the link may have expired or the website may be down. In that case, contact whoever gave you the QR code and ask for the information in another format.

Frequently Asked Questions

Can I scan a QR code that is on my computer screen?

Yes, but you will need a second device. Take a screenshot of the QR code on your screen, save it, then upload that screenshot to a free decoder website. Alternatively, if you have a smartphone nearby, use your phone to scan the code displayed on your computer monitor.

Is it safe to scan QR codes from the internet?

QR codes themselves are safe, but the links they contain may not be. Before clicking a link from a decoded QR code, hover over it to see the actual URL. If it looks suspicious or does not match what you expected, do not open it. Avoid scanning codes from emails or messages you did not ask for.

What if the QR code is damaged or blurry?

QR codes are designed to work even if part of them is damaged or obscured. Try uploading the image to multiple decoder websites — some are more robust than others. If the code is printed, try photographing it from different angles or in different lighting. If it is on a screen, take a high-resolution screenshot.

Can I create my own QR code on my computer?

Yes, many free websites like QR-Server.com and GoQR.me let you generate QR codes from text, URLs, or contact information. Type or paste your content, and the site will create a QR code you can read and print or share. No software installation is needed.

Do I need special software to scan QR codes on Windows or Mac?

No. Windows has Magnifier built in, and Mac has Preview. Both are free and come with the operating system. You can also use any free online decoder or browser extension. You do not need to buy anything.