Question 1

What is a QR code?

Accepted Answer

A QR (Quick Response) code is a type of two-dimensional barcode that can store text, URLs, contact information, and other data. Originally created by Denso Wave in 1994 for automotive parts tracking, QR codes have become ubiquitous for marketing, payments, product info, and contactless data sharing. They can be scanned by smartphone cameras and apps.

Question 2

Which browsers support QR code scanning?

Accepted Answer

This tool uses the BarcodeDetector API, which is natively supported in Chromium-based browsers: Google Chrome (version 83+), Microsoft Edge, and Opera. It is not yet supported in Firefox or Safari. If you are using an unsupported browser, try opening this page in Chrome or Edge for the best experience.

Question 3

Is my image uploaded to a server?

Accepted Answer

No. All processing is done entirely in your browser using the BarcodeDetector API. Your image never leaves your device or network. This makes the tool private, fast, and available even offline once the page is loaded.

Question 4

What image formats are supported?

Accepted Answer

The scanner accepts any image format that your browser can display: PNG, JPEG/JPG, GIF, WebP, BMP, and SVG. For best results, use a clear, high-resolution image of the QR code with good contrast and minimal background noise. Blurry or partially obscured QR codes may fail to scan.

Question 5

What should I do if the QR code is not detected?

Accepted Answer

Try these steps: (1) Ensure you are using a Chromium-based browser (Chrome, Edge). (2) Use a clearer or higher resolution image. (3) Make sure the entire QR code is visible in the image with some margin around it. (4) Try increasing the contrast by adjusting brightness. (5) If the image is very large, try cropping it tightly around the QR code.

QR Code Scanner

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