QR Code Scanner

Learn more about the QR code scanner and how it works.
QR Code Scanner
4 mins read
20 Nov 2023

What are QR code scanners

QR codes have become an integral part of our daily lives. These seemingly simple black-and-white patterns can unlock a wealth of information, connect us to websites, and facilitate various transactions. To harness the full potential of QR codes, we rely on QR code scanners. QR code scanners are versatile tools that read and decode QR codes, unlocking information and facilitating various actions. They work through smartphone apps or built-in camera features, making them accessible to users across iPhone and Android devices. QR code scanners offer efficiency, versatility, cost-effective marketing, and contactless transaction capabilities, enhancing connectivity in our digital world.

What is a QR code

QR code, which stands for Quick Response code, is a two-dimensional barcode that was initially developed in Japan in the 1990s. Unlike traditional barcodes that can only store a limited amount of information horizontally, QR codes can hold a significant amount of data both vertically and horizontally. This unique feature makes them versatile and suitable for a wide range of applications.

QR codes consist of a grid of squares arranged on a white background. These squares contain information encoded in the form of black squares and white spaces. This information can represent various types of data, such as website URLs, contact information, text, or even Wi-Fi network credentials.

Types of QR codes

There are 3 basic types of QR codes.

Numeric QR codes

These have the capacity to accommodate as many as 7,089 numeric characters, encompassing data such as phone numbers or identification codes. They prove particularly useful for encoding substantial quantities of numerical information.

Alphanumeric QR codes

Alphanumeric QR codes boast a storage capacity of up to 4,296 characters, including letters, numbers, and special symbols. These codes are employed for encoding text messages, URLs, or email addresses.

Binary QR codes

These are capable of storing up to 2,953 bytes of binary data, which can encompass images, audio files, or other multimedia content. They are employed in applications that require more intricate data storage capabilities.

How does a QR code scanner work

A QR code scanner is a software application or a built-in feature in a mobile device's camera that can read and decode the information stored within QR codes. The process of scanning a QR code is relatively straightforward:

  1. Activation
    Open the QR code scanner app on your mobile device or use the built-in camera feature that supports QR code scanning.
  2. Positioning
    Ensure that the QR code is well-lit and properly aligned within the camera's viewfinder. Hold your device steady to get a clear image of the QR code.
  3. Scanning
    Once the camera detects the QR code within its frame, it will automatically focus on it and attempt to decode the information embedded in the code.
  4. Action
    Depending on the content of the QR code, the scanner will initiate a specific action. This can include opening a website, adding contact details to your address book, or displaying a message or discount coupon.
  5. Confirmation
    After the scanner successfully decodes the QR code, it may provide a confirmation message or prompt you to take further action, such as visiting a website or saving contact information.

How to use a QR code to make payments

Using a QR code for making payments is a straightforward and convenient process. Here is a step-by-step guide:

  1. Download a payment app
    First, ensure you have a mobile payment app installed on your smartphone. Popular examples include the Bajaj Finserv BBPS platform, Bajaj Finserv app, or any bank’s official app.
  2. Open the payment app
    Launch your chosen payment app and ensure it is linked to your preferred payment method, such as a credit card, debit card, Bajaj Pay Wallet, Bajaj Pay UPI, or net banking.
  3. Access the QR code scanner
    Within the payment app, look for an option to scan QR codes. This feature is typically found in the app's navigation menu or home screen.
  4. Scan the QR code
    Position your smartphone's camera over the QR code displayed by the merchant or the person you are paying. Ensure that the code is well-lit and within the camera's frame.
  5. Review payment details
    The app will decode the QR code and display payment details, including the recipient's information and the amount to be paid. Verify these details before proceeding.
  6. Confirm and authenticate
    Confirm the payment by authorising it within the app. Depending on the app's security settings, you may need to use a PIN, fingerprint, or face recognition to complete the transaction.
  7. Payment confirmation
    Once confirmed, you will receive a payment confirmation, and the funds will be transferred to the recipient's account instantly.

Features and benefits of a QR code

QR codes offer several compelling features and benefits that have contributed to their widespread adoption:

  1. Efficiency and speed
    QR codes can store a substantial amount of information, making payments quick and efficient. This efficiency is particularly advantageous for businesses and organisations that need to share detailed information with their customers or clients.
  2. Versatility
    QR codes can represent various types of data, including website URLs, contact details, product information, event invitations, and more. Their versatility makes them suitable for a wide range of applications in different industries.
  3. Cost-effective marketing
    Businesses can use QR codes for cost-effective marketing campaigns. By placing QR codes on marketing materials, products, or advertisements, companies can provide instant access to additional information, discounts, or promotional offers, enhancing customer engagement.
  4. Contactless transactions
    In a world increasingly focused on contactless interactions, QR codes have found a new purpose. They enable contactless payments, ticketing, and check-ins, reducing the need for physical touchpoints and enhancing safety.
  5. Easy integration
    QR codes can be easily integrated into existing marketing materials, websites, and mobile apps. This simplicity makes it convenient for businesses to adopt and incorporate QR codes into their strategies.

How can we scan a QR code from a screenshot?

Scanning a QR code from a screenshot is a practical method when you have a saved image of a QR code that you want to interact with. Here is how to do it:

  1. Locate the QR code
    Find the screenshot containing the QR code that you want to scan. It might be in your device's gallery or in a specific folder where you saved the screenshot.
  2. Open the QR code scanner
    Open the Bajaj Finserv app on your device and open the QR code scanner.
  3. Select the screenshot
    Choose the screenshot from your gallery that contains the QR code you want to scan.
  4. Scan and make payment
    The scanner will recognise and decode the QR code from the screenshot. Follow the prompts on your device to complete the action associated with the QR code's content.

QR code scanners have become an indispensable tool in our modern world, enabling us to access information, make transactions, and connect with businesses and organisations seamlessly. With their ease of use and wide compatibility with modern smartphones, QR codes have truly revolutionised the way we interact with the digital realm, making our lives more convenient and efficient. Whether you are using an iPhone or an Android device, scanning QR codes has never been easier, allowing you to unlock a world of possibilities with a simple scan.

Where can I pay with a QR code?

You can pay with a QR code at various locations and services, including:

  • Retail stores
    Many retail stores accept QR code payments through mobile wallets or dedicated payment apps.
  • Restaurants and cafes
    Some dining establishments use QR codes for menu access and payments.
  • Online shopping
    E-commerce platforms often allow QR code payments during the checkout process.
  • Public transportation
    Some cities offer QR code-based ticketing for buses, trains, and other public transportation.
  • Utilities and bills:
    Paying bills for utilities or services may involve QR code payments through relevant apps.
  • Peer-to-peer transactions
    Use QR codes to send or receive money in peer-to-peer transactions with friends or family.
  • Events and venues
    At events or venues, QR codes may be used for ticketing or purchasing merchandise.
  • Charitable donations
    Some charitable organisations facilitate donations through QR codes.

Ensure you have a mobile payment app compatible with QR codes to make payments in these situations.

Benefits of using QR code scanner for business

Using a QR code scanner for business brings several benefits:

  • Contactless and efficient transactions
    Facilitates touchless payments, enhancing customer safety. Speeds up payment processes, ensuring swift transactions.
  • Marketing opportunities
    QR codes link to promotions, discounts, or loyalty programs for effective marketing.
  • Reduced cash handling
    Minimises cash transactions, streamlining financial processes.
  • Enhanced customer experience
    Simplifies the purchasing experience, boosting overall satisfaction.
  • Data collection
    QR codes aid in customer data collection for market research and personalised marketing.
  • Inventory management
    Facilitates efficient inventory tracking, optimizing stock levels.
  • Paperless transactions
    Reduces reliance on paper receipts, promoting eco-friendly practices.
  • Improved security
    Enhances transaction security through encrypted QR codes.


While care is taken to update the information, products, and services included in or available on our website and related platforms/ websites, there may be inadvertent inaccuracies or typographical errors or delays in updating the information. The material contained in this site, and on associated web pages, is for reference and general information purpose and the details mentioned in the respective product/ service document shall prevail in case of any inconsistency. Subscribers and users should seek professional advice before acting on the basis of the information contained herein. Please take an informed decision with respect to any product or service after going through the relevant product/ service document and applicable terms and conditions. In case any inconsistencies are observed, please click on reach us.

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Frequently asked questions

How can I scan a QR code online?

You can scan a QR code using the scanner on your phone. However, to make payments, you need to scan it through a UPI linked payment app. The Bajaj Finserv app also provides a QR payment facility to make your payments seamless.

Can I scan a QR code without an app?

Yes, you can scan a QR code using the default camera app on your phone. Just face the camera towards the QR and it will show the link, and you can tap on the link to view it.

How does a QR code payment work?

A responsive QR code is one that a QR code scanner can effortlessly read, initiating a user to access an external link upon scanning. This external link provides the user with the pertinent information they are seeking.

What Is a vCard QR code?

A vCard QR code is a QR code that encapsulates a vCard file. A vCard, also known as a virtual contact card, serves as the standardised file format for electronic business cards, including details like name, title, logo, photograph, contact numbers, physical addresses, and email addresses.

How can I connect to Wi-Fi using a QR code?
  1. Navigate to ‘SETTINGS’
  3. Tap the scanner icon to the right of your network
  4. Choose the ‘QR CODE’ option
  5. If not available, press the ‘SHARE’ button on the right, and confirm your identity using your PIN or fingerprint if required


How to check if your phone camera automatically scans QR Codes?

To check if your phone camera automatically scans QR Codes, follow these steps:

  1. Open your camera app and hold it steady for 2-3 seconds towards the QR Code you want to scan
  2. If scanning is enabled, a notification will appear
  3. If nothing happens, check your Settings app, and enable QR code scanning
  4. If QR codes are not an option in your settings, your device may not support native QR code scanning. In this case, you must download a third-party QR code reader app (do read the reviews before downloading)
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