What is a QR Code and How Does It Work?

Created on 17 July, 2025 • 1 views • 2 minutes read

Learn what a QR code is, how it works, and where it is used. Understand the different QR code types like URL, WiFi, UPI, vCard and more.

What is a QR Code and How Does It Work?

QR Codes (Quick Response Codes) are two-dimensional barcodes that can be scanned using a smartphone or camera-enabled device. They provide instant access to digital content—no typing or clicking required.

🧠 A Brief History of QR Codes

QR codes were invented in 1994 by a Japanese company named Denso Wave to track vehicle parts in manufacturing. Over time, they’ve evolved into a powerful tool for payments, marketing, contactless access, and more.

📷 How QR Codes Work

When scanned, the black and white matrix pattern of a QR code is read by a camera or scanner. It decodes the embedded data (like a URL, contact, text, or payment info) and performs an action—such as opening a link or connecting to WiFi.

📂 Types of QR Codes

There are many types of QR codes, each serving a unique purpose. Below are the most commonly used types:

Text QR Code: Displays a plain message
URL QR Code: Opens a website or landing page
Phone QR Code: Initiates a phone call
SMS QR Code: Sends a pre-filled SMS
Email QR Code: Opens a draft email
WhatsApp QR Code: Starts a chat without saving the number
vCard QR Code: Shares your contact as a digital business card
UPI QR Code: Accepts payments in India via apps like PhonePe, GPay
WiFi QR Code: Connects to WiFi automatically
Event QR Code: Adds calendar events

💡 Real-World Uses of QR Codes

QR codes are used across industries for their speed, ease, and versatility:

📦 Product packaging (link to user manuals or videos)
📄 Business cards (with vCard QR codes)
🏬 Shop payments (UPI, PayPal, PIX)
🍽 Restaurant menus (PDF or web menu)
🛍 Marketing flyers and banners
🎉 Event check-ins and invitations

⚙️ How to Create a QR Code

You can create a custom QR code easily with tools like qrcreates.com. Just select your desired QR type, enter the details, and click "Generate". Your QR code is instantly available for download.

🔐 Are QR Codes Safe?

Most QR codes are safe, but it’s best to scan codes only from trusted sources. For added security, modern phones show a preview of the link before opening it.

📲 Scan and Go!

With a simple scan, QR codes connect the physical and digital worlds. From payments to promotions, they offer fast, seamless interaction—and you can generate your own 100% free QR codes right here on qrcreates.com.

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Published by qrcreates.com – Your all-in-one QR code and barcode generator