How to scan a QR code directly from your computer screen?
Use an online QR code scanner to scan a QR code on an electronic screen (such as a computer monitor, a mobile phone sub-screen, or a tablet interface). The following methods can be used. Focus on solving special scene problems such as screen reflection and pixel interference:
Method 1: Real-time scanning with web tools (recommended)
Applicable scenarios: mobile phones/tablets scanning computer, TV, etc. screens
Open the online scanner
Type Online-QR-Scanner.com in the device browser
Authorize camera permissions
Click the Scan button → Allow access to the camera
Aim at the QR code on the screen
Keep the phone parallel to the screen, 15-20cm away
Adjust the angle to avoid reflections (such as tilting the phone 30°)
Click Enhanced Mode in the web tool (if available) to reduce moiré interference
Method 2: Take a screenshot and upload it for recognition
Applicable scenarios: QR codes on computer monitors, low-brightness screens
Capture the screen
Windows: Win+Shift+S / Mac: Cmd+Shift+4 Select the QR code area
Upload to the online QR code scanner
Click Upload image on the scanner webpage → Select the screenshot file
Automatically parse the content (support JPG, PNG, GIF, SVG, WEBP, BMP and other formats)
Method 3: Quick scan across devices (no screenshot required)
Applicable scenario: Mobile phone A scans the QR code on mobile phone B
Open the online QR code scanner website on device B (displaying the QR code)
Click Generate scan page → Generate a temporary scan link Online-QR-Scanner.com
Device A accesses this link → Directly calls the camera to scan the screen of device B