What is QR Code Reader?
A QR Code Reader is a tool that interprets the data stored within a QR code. Using computer vision technology, it analyzes the pattern of black and white squares to reconstruct the original information, whether it's a website URL, a text message, or contact details. This tool runs entirely in your browser, allowing you to scan QR codes using your device's camera or by uploading an image file, without sending the image to a remote server.
Input Formats
- Webcam video stream
- Image files (PNG, JPG, WEBP)
- Screenshots
Output Results
- Decoded text/URL
- Raw data
- Copy-ready result
Key Features
Who is this for?
Desktop Scanning
Scanning a QR code displayed on a website or email without needing a phone.
Verification
Checking the destination of a QR code before visiting the link.
Data Extraction
Extracting text or Wi-Fi passwords from saved QR code images.
How to Use
Select 'Camera' to scan with your webcam.
Or select 'Upload' to choose an image file.
The tool will automatically detect and decode the QR code.
Copy the result.
Examples
Input
[Image of QR Code]Output
https://example.comCommon Errors
- Blurry images or low lighting
- QR code too small or far away
- Damaged or distorted codes
Code Examples
JavaScript (jsQR)
const code = jsQR(imageData.data, imageData.width, imageData.height);
if (code) {
console.log('Found QR code', code.data);
}