QR Code Scanner

Overview

A QR scanner decodes the black-and-white matrix of a QR code back into the text, URL, Wi-Fi credentials, or contact card it encodes. You don't always have a phone handy, and some QR codes arrive as image files — in an email, a PDF, a screenshot, or a saved photo. This scanner reads QR codes two ways: from an uploaded image, or live from your device camera. Everything is decoded locally in your browser, so the contents of a private QR code never leave your machine.

How to Use (Step by Step)

1. 1

   Upload an image or start the camera

   Drop a screenshot/photo containing a QR code, or grant camera access to scan a physical code live.

2. 2

   Let the scanner decode

   Decoding is automatic and instant. The code can be rotated, slightly blurry, or off-center — error correction handles it.

3. 3

   Review the decoded content

   The raw text or URL appears. Always read a URL before opening it — never auto-trust where a QR code leads.

How It Works

The tool loads your image (or a live camera frame) onto a canvas, reads the raw pixel data, and runs a QR-decoding algorithm that locates the three finder patterns in the corners, corrects for rotation and perspective, then reads the data modules and applies Reed-Solomon error correction to recover the payload even if the code is partially damaged or blurry. The decoded string is shown as text; if it's a URL, you can open it after reviewing it.

When to Use This

Opening a QR code you received as a screenshot or image file on a desktop with no phone nearby. Extracting a Wi-Fi password from a printed QR code. Reading a QR on a poster or flyer photo. Checking what a suspicious QR code actually points to before visiting it — seeing the raw URL first protects you from 'quishing' (QR phishing) scams. Batch-checking QR codes in scanned documents.

Frequently Asked Questions