Generate QR Code
Scan QR Code
What are QR Codes?
QR codes (Quick Response codes) are two-dimensional barcodes that store information as a series of black and white squares. Unlike traditional barcodes, which are one-dimensional and read horizontally, QR codes can store data in both horizontal and vertical directions. This allows QR codes to store significantly more information, such as URLs, contact details, Wi-Fi credentials, and more.
How Do QR Codes Work?
QR codes are made up of a unique pattern of black squares arranged on a white background. This pattern encodes information, which can be decoded by a QR code scanner or a smartphone camera. When a QR code is scanned, the device reads the pattern, interprets the data, and performs the associated action (e.g., opening a link or connecting to Wi-Fi).
QR Code Generators and Scanners
A QR code generator converts input data (such as text, URLs, phone numbers, or Wi-Fi credentials) into a QR code image that can be scanned. A QR code scanner, on the other hand, decodes the information stored in the QR code. In modern applications, QR code scanning can be done using the camera of a smartphone or a dedicated scanner device.
Technology Used in This File
This page is built using:
- JavaScript: The QR code generator uses JavaScript to generate QR codes using the
'QRCode' library. The scanner interacts with the camera using the browser's media capabilities (via
getUserMedia()API). - HTML5 & CSS: HTML is used for the structure of the page, and CSS is used to style the QR code generator/scanner and make it mobile responsive.
- QRCode.js: This is a JavaScript library used to generate QR codes dynamically on the web page.
- MediaDevices API: The scanner feature is powered by the browser's MediaDevices API, allowing access to the device's camera for real-time scanning.