jsqr vs qrcode-reader vs html5-qrcode vs qr-scanner
JavaScript QR Code Libraries Comparison
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jsqrqrcode-readerhtml5-qrcodeqr-scannerSimilar Packages:
What's JavaScript QR Code Libraries?

These libraries are designed to facilitate the reading and generation of QR codes in web applications. They provide developers with tools to easily integrate QR code scanning functionality into their applications, allowing users to interact with QR codes for various purposes such as authentication, payment processing, and information retrieval. Each library has its unique features, performance characteristics, and use cases, making them suitable for different project requirements and developer preferences.

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jsqr171,9693,765-964 years agoApache-2.0
qrcode-reader60,657278-177 years agoApache-2.0
html5-qrcode59,1975,1902.63 MB3752 years agoApache-2.0
qr-scanner26,1602,560524 kB113-MIT
Feature Comparison: jsqr vs qrcode-reader vs html5-qrcode vs qr-scanner

Scanning Capability

  • jsqr:

    jsqr focuses solely on scanning QR codes from image data. It is optimized for performance and can decode QR codes quickly, making it suitable for applications that require fast processing without additional features.

  • qrcode-reader:

    qrcode-reader can read QR codes from images and video streams, providing flexibility for various use cases. It includes robust error handling and supports multiple image formats, ensuring reliable QR code reading.

  • html5-qrcode:

    html5-qrcode offers both scanning and generating capabilities, allowing developers to implement QR code functionality seamlessly. It supports real-time scanning using the device's camera and can also generate QR codes from text or URLs.

  • qr-scanner:

    qr-scanner provides real-time scanning functionality directly from the camera feed, making it ideal for mobile applications. It automatically adjusts to different lighting conditions and camera resolutions to enhance scanning accuracy.

Ease of Use

  • jsqr:

    jsqr has a minimalistic API that is easy to use for developers familiar with JavaScript. It requires only a few lines of code to set up and start scanning, making it a good choice for quick implementations.

  • qrcode-reader:

    qrcode-reader provides a comprehensive API that may require more initial setup compared to others, but it offers detailed documentation and examples to guide developers through the integration process.

  • html5-qrcode:

    html5-qrcode is designed with simplicity in mind, featuring a straightforward API that allows developers to quickly integrate QR code functionality into their applications. Its documentation is user-friendly, making it accessible for developers of all skill levels.

  • qr-scanner:

    qr-scanner offers a simple setup process and clear documentation, making it easy for developers to implement real-time scanning in their applications. Its focus on mobile usability enhances the user experience.

Performance

  • jsqr:

    jsqr is highly efficient and lightweight, designed specifically for fast QR code scanning. Its performance is particularly notable when processing large images or when high-speed scanning is necessary.

  • qrcode-reader:

    qrcode-reader provides reliable performance but may not be as fast as jsqr or qr-scanner in real-time scenarios. It is more suited for applications where reading from static images is the primary use case.

  • html5-qrcode:

    html5-qrcode is optimized for performance, allowing for quick scanning and generation of QR codes. It balances functionality and speed, making it suitable for applications that require both features without compromising on performance.

  • qr-scanner:

    qr-scanner excels in real-time performance, leveraging the device's camera for instant scanning. It is optimized for mobile devices, ensuring smooth user experiences even in varying conditions.

Compatibility

  • jsqr:

    jsqr is a pure JavaScript library that can run in any environment that supports JavaScript, making it highly compatible with different frameworks and applications.

  • qrcode-reader:

    qrcode-reader supports multiple image formats and can be integrated into various web applications, making it versatile for different development environments.

  • html5-qrcode:

    html5-qrcode is compatible with modern web browsers and supports various devices, ensuring a wide range of usability across platforms. It is designed to work seamlessly on both desktop and mobile environments.

  • qr-scanner:

    qr-scanner is designed for mobile-first applications and works well on both Android and iOS devices. Its compatibility with various camera types enhances its usability in real-world scenarios.

Community and Support

  • jsqr:

    jsqr is a well-maintained library with an active community. It has comprehensive documentation and examples, making it easier for developers to find help and resources.

  • qrcode-reader:

    qrcode-reader has a dedicated user base and provides extensive documentation. However, its community may not be as large as some of the other libraries, which could affect the availability of third-party resources.

  • html5-qrcode:

    html5-qrcode has a growing community and provides good support through documentation and GitHub issues. Its popularity is increasing, which may lead to more community-contributed resources in the future.

  • qr-scanner:

    qr-scanner has a supportive community and offers solid documentation. Developers can find various tutorials and examples online to assist with implementation.

How to Choose: jsqr vs qrcode-reader vs html5-qrcode vs qr-scanner
  • jsqr:

    Select jsqr if you require a lightweight and efficient library specifically for QR code scanning. It is designed for performance and can decode QR codes directly from image data, making it ideal for applications that need fast scanning capabilities without additional features.

  • qrcode-reader:

    Choose qrcode-reader if you need a comprehensive solution for reading QR codes from images or video streams. It supports various image formats and provides detailed error handling, making it suitable for applications that require robust QR code reading capabilities.

  • html5-qrcode:

    Choose html5-qrcode if you need a library that supports both scanning and generating QR codes with a focus on simplicity and ease of use. It offers a straightforward API and is suitable for applications that require quick integration without complex setup.

  • qr-scanner:

    Opt for qr-scanner if you are looking for a library that provides real-time scanning capabilities using the device's camera. It is particularly useful for mobile applications where instant scanning is essential, and it includes features for handling different camera resolutions and lighting conditions.

Similar Npm Packages to jsqr

jsqr is a JavaScript library designed for decoding QR codes from images or video streams. It is lightweight and efficient, making it suitable for web applications that require QR code scanning capabilities. With jsqr, developers can easily integrate QR code scanning functionality into their projects, allowing users to quickly read and process QR codes using their device's camera or uploaded images.

While jsqr is a solid choice for QR code scanning, there are several alternatives available that offer similar functionalities. Here are a few notable options:

  • html5-qrcode is a comprehensive library that provides a simple interface for scanning QR codes using the device's camera. It supports both desktop and mobile browsers and is designed to work seamlessly with HTML5. With features like real-time scanning and customizable UI elements, html5-qrcode is an excellent choice for developers looking to implement QR code scanning in their web applications without much hassle.

  • qr-scanner is another lightweight library focused on QR code scanning. It utilizes the device's camera to scan QR codes in real-time and is optimized for performance. qr-scanner is easy to set up and use, making it a great option for developers who want a straightforward solution for QR code scanning without additional dependencies.

  • qrcode-reader is a library that allows for reading QR codes from images. It is built on top of the popular jsQR library and provides a simple API for decoding QR codes from image files. If your application requires reading QR codes from static images rather than real-time scanning, qrcode-reader is a suitable alternative.

For a comprehensive comparison of these packages, check out the following link: Comparing html5-qrcode vs jsqr vs qr-scanner vs qrcode-reader.

Similar Npm Packages to qrcode-reader

qrcode-reader is a JavaScript library that enables developers to easily read QR codes from images or video streams. It provides a simple API for integrating QR code scanning functionality into web applications, making it a popular choice for projects that require QR code recognition. While qrcode-reader is a solid option, there are several alternatives available in the ecosystem that also offer QR code scanning capabilities. Here are a few notable alternatives:

  • html5-qrcode is a powerful library that allows developers to implement QR code scanning using the HTML5 getUserMedia API. It can access the device camera to scan QR codes in real-time, making it ideal for applications that require immediate feedback. With its robust features and support for various QR code formats, html5-qrcode is a great choice for projects that need real-time scanning capabilities.
  • qr-scanner is another library designed for fast and efficient QR code scanning. It uses WebAssembly to decode QR codes quickly and accurately, providing a smooth user experience. qr-scanner is lightweight and easy to integrate, making it suitable for applications that prioritize performance and simplicity. If speed and efficiency are critical for your QR code scanning needs, qr-scanner is worth considering.
  • qrious is a versatile library that not only allows for QR code generation but also provides basic QR code scanning capabilities. While it may not be as feature-rich as some of the other libraries, qrious is easy to use and can be a good option for projects that require both QR code generation and scanning in a single package. If you are looking for a simple solution that covers both aspects, qrious might be the right fit.

To see how qrcode-reader compares with html5-qrcode, qr-scanner, and qrious, check out the comparison: Comparing html5-qrcode vs qr-scanner vs qrcode-reader vs qrious.

Similar Npm Packages to html5-qrcode

html5-qrcode is a powerful library that enables developers to easily integrate QR code scanning capabilities into their web applications. Utilizing the capabilities of modern web browsers, html5-qrcode allows for real-time scanning of QR codes using the device's camera. This library is particularly useful for applications that require quick and efficient QR code recognition, such as payment systems, event check-ins, and product information retrieval.

While html5-qrcode offers robust features for QR code scanning, there are alternative libraries that also provide QR code scanning functionalities. Here are a couple of notable alternatives:

  • qr-scanner is a lightweight and easy-to-use library for scanning QR codes in web applications. It focuses on performance and simplicity, making it a great choice for developers who want to quickly implement QR code scanning without the overhead of more complex libraries. qr-scanner uses the HTML5 video element to access the camera and process frames for QR code detection, ensuring a smooth user experience. It is particularly well-suited for applications that require fast and efficient QR code scanning with minimal setup.

  • qrious is a versatile library that provides both QR code generation and scanning capabilities. It allows developers to create QR codes in various formats and sizes, making it a great option for applications that need to display QR codes as well as read them. qrious is easy to integrate and offers a straightforward API, making it accessible for developers of all skill levels. If your application requires both generating and scanning QR codes, qrious could be the ideal choice.

To see how html5-qrcode compares with qr-scanner and qrious, check out the comparison: Comparing html5-qrcode vs qr-scanner vs qrious.

Similar Npm Packages to qr-scanner

qr-scanner is a lightweight JavaScript library designed for scanning QR codes using a webcam or mobile device camera. It provides an easy-to-use interface for developers to integrate QR code scanning capabilities into their web applications. With its efficient performance and straightforward API, qr-scanner is a popular choice for applications that require real-time QR code scanning.

However, there are several alternatives in the QR code scanning ecosystem that offer different features and functionalities. Here are a few notable options:

  • html5-qrcode is a powerful library that allows developers to add QR code scanning capabilities to their web applications using the HTML5 video element. It supports both front-end and back-end QR code scanning and provides a simple API for integration. html5-qrcode is particularly useful for applications that need to scan QR codes from both camera feeds and image files, making it a versatile choice for developers.
  • jsqr is a pure JavaScript QR code scanning library that focuses on decoding QR codes from images or video frames. It is lightweight and efficient, making it suitable for performance-sensitive applications. jsqr is a good choice if you need a minimalistic library that can decode QR codes quickly without additional overhead.
  • qr-code-styling is a library that allows developers to create visually appealing QR codes with customizable styles. While it does not focus on scanning, it complements QR code functionality by enabling the creation of branded and styled QR codes that can enhance user engagement. If your application requires both scanning and generating QR codes, combining qr-code-styling with a scanning library can provide a complete solution.
  • qrcode-reader is a simple QR code reader library that can decode QR codes from images. It is easy to use and integrates well with existing applications. qrcode-reader is suitable for projects that need a straightforward solution for reading QR codes without the need for camera integration.
  • qrious is a library focused on generating QR codes. It provides a simple API for creating QR codes in various formats and sizes. While it does not provide scanning capabilities, it can be used alongside scanning libraries to create a complete QR code solution.

For a comprehensive comparison of these libraries, check out the following link: Comparing html5-qrcode vs jsqr vs qr-code-styling vs qr-scanner vs qrcode-reader vs qrious.

README for jsqr

jsQR

Build Status

A pure javascript QR code reading library. This library takes in raw images and will locate, extract and parse any QR code found within.

Demo

Installation

NPM

Available on npm. Can be used in a Node.js program or with a module bundler such as Webpack or Browserify.

npm install jsqr --save

// ES6 import
import jsQR from "jsqr";

// CommonJS require
const jsQR = require("jsqr");

jsQR(...);

Browser

Alternatively for frontend use jsQR.js can be included with a script tag

<script src="jsQR.js"></script>
<script>
  jsQR(...);
</script>

A note on webcams

jsQR is designed to be a completely standalone library for scanning QR codes. By design it does not include any platform specific code. This allows it to just as easily scan a frontend webcam stream, a user uploaded image, or be used as part of a backend Node.js process.

If you want to use jsQR to scan a webcam stream you'll need to extract the ImageData from the video stream. This can then be passed to jsQR. The jsQR demo contains a barebones implementation of webcam scanning that can be used as a starting point and customized for your needs. For more advanced questions you can refer to the getUserMedia docs or the fairly comprehensive webRTC sample code, both of which are great resources for consuming a webcam stream.

Usage

jsQR exports a method that takes in 3 arguments representing the image data you wish to decode. Additionally can take an options object to further configure scanning behavior.

const code = jsQR(imageData, width, height, options?);

if (code) {
  console.log("Found QR code", code);
}

Arguments

  • imageData - An Uint8ClampedArray of RGBA pixel values in the form [r0, g0, b0, a0, r1, g1, b1, a1, ...]. As such the length of this array should be 4 * width * height. This data is in the same form as the ImageData interface, and it's also commonly returned by node modules for reading images.
  • width - The width of the image you wish to decode.
  • height - The height of the image you wish to decode.
  • options (optional) - Additional options.
    • inversionAttempts - (attemptBoth (default), dontInvert, onlyInvert, or invertFirst) - Should jsQR attempt to invert the image to find QR codes with white modules on black backgrounds instead of the black modules on white background. This option defaults to attemptBoth for backwards compatibility but causes a ~50% performance hit, and will probably be default to dontInvert in future versions.

Return value

If a QR is able to be decoded the library will return an object with the following keys.

  • binaryData - Uint8ClampedArray - The raw bytes of the QR code.
  • data - The string version of the QR code data.
  • chunks - The QR chunks.
  • version - The QR version.
  • location - An object with keys describing key points of the QR code. Each key is a point of the form {x: number, y: number}. Has points for the following locations.
    • Corners - topRightCorner/topLeftCorner/bottomRightCorner/bottomLeftCorner;
    • Finder patterns - topRightFinderPattern/topLeftFinderPattern/bottomLeftFinderPattern
    • May also have a point for the bottomRightAlignmentPattern assuming one exists and can be located.

Because the library is written in typescript you can also view the type definitions to understand the API.

Contributing

jsQR is written using typescript. You can view the development source in the src directory.

Tests can be run with

npm test

Besides unit tests the test suite contains several hundred images that can be found in the /tests/end-to-end/ folder.

Not all the images can be read. In general changes should hope to increase the number of images that read. However due to the nature of computer vision some changes may cause images that pass to start to fail and visa versa. To update the expected outcomes run npm run-script generate-test-data. These outcomes can be evaluated in the context of a PR to determine if a change improves or harms the overall ability of the library to read QR codes. A summary of which are passing and failing can be found at /tests/end-to-end/report.json

After testing any changes, you can compile the production version by running

npm run-script build

Pull requests are welcome! Please create seperate branches for seperate features/patches.

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