what is a qr code

A QR code is a type of two‑dimensional barcode that stores data as a grid of black and white squares that can be read quickly by a camera or scanner- equipped device, usually a smartphone. The term QR stands for “Quick Response,” reflecting how fast the encoded information (like a URL, text, or payment info) can be accessed after scanning.

Quick Scoop

A QR code is essentially a visual shortcut between the physical and digital worlds. When scanned, it can instantly open a website, show a message, add a contact, connect to Wi‑Fi, or trigger an app action.

How a QR code works

• A QR code uses a matrix of squares that encodes data in both horizontal and vertical directions, which lets it store much more information than a traditional one‑dimensional barcode.

• A scanning app or built‑in phone camera reads this pattern, applies error correction, and then decodes the data into something usable, such as a link or text.

Common uses today

• Marketing and payments: menus, posters, tickets, and contactless payments routinely use QR codes to send users to websites, apps, or checkout pages.

• Logistics and verification: businesses use them for product tracking, authentication, and inventory because they can encode identifiers, serial numbers, and more in one symbol.

Are QR codes safe?

• QR codes themselves are just data containers, but malicious links can be hidden in them, leading to phishing sites or unwanted app downloads if you scan carelessly.

• Security experts recommend checking the URL preview, avoiding codes stuck over other codes, and not entering sensitive information after scanning unless the source is clearly trustworthy.

A bit of background

• QR codes were invented in 1994 by Masahiro Hara at Denso Wave in Japan to track auto parts more efficiently than traditional barcodes.

• Their popularity surged globally during the 2020s because they enabled touch‑free interactions in areas like restaurant menus, check‑ins, and health or event passes.

TL;DR: A QR code is a scannable, two‑dimensional barcode that quickly links you to digital information (like websites or payments), widely used because it is fast, flexible, and easy for smartphones to read.

Information gathered from public forums or data available on the internet and portrayed here.