Pros of ZXing

• Multi-format support: ZXing can handle various barcode formats beyond QR codes
• Mature and widely adopted: Used in many production applications
• Extensive documentation and community support

Cons of ZXing

• Larger codebase and dependencies: May be overkill for simple QR code generation
• Steeper learning curve: More complex API due to its multi-format support

Code Comparison

QR-Code-generator (Java):

QrCode qr = QrCode.encodeText("Hello, world!", QrCode.Ecc.MEDIUM);
BufferedImage img = qr.toImage(4, 10);
ImageIO.write(img, "png", new File("qr-code.png"));

ZXing (Java):

QRCodeWriter writer = new QRCodeWriter();
BitMatrix bitMatrix = writer.encode("Hello, world!", BarcodeFormat.QR_CODE, 200, 200);
BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
ImageIO.write(image, "PNG", new File("qr-code.png"));

Summary

QR-Code-generator is a lightweight, focused library for QR code generation, while ZXing is a comprehensive barcode processing library. QR-Code-generator is simpler to use for basic QR code tasks, while ZXing offers more flexibility and features at the cost of increased complexity.

Pros of libqrencode

• More mature and widely used library with extensive documentation
• Supports a broader range of QR code versions and error correction levels
• Offers additional features like Micro QR code generation

Cons of libqrencode

• Written in C, which may be less accessible for some developers
• Larger codebase and potentially more complex to integrate
• Slower development and update cycle compared to QR-Code-generator

Code Comparison

QR-Code-generator (C++):

QrCode qr = QrCode::encodeText("Hello, world!", QrCode::Ecc::MEDIUM);

libqrencode (C):

QRcode *qr = QRcode_encodeString("Hello, world!", 0, QR_ECLEVEL_M, QR_MODE_8, 1);

Both libraries offer straightforward APIs for generating QR codes, but QR-Code-generator's C++ interface may be more intuitive for some developers. libqrencode provides more low-level control and options, which can be beneficial for advanced use cases but may require more setup.

QR-Code-generator focuses on simplicity and ease of use, making it a good choice for projects that need basic QR code functionality. libqrencode is better suited for applications requiring more advanced features or fine-grained control over the QR code generation process.

Pros of jsQR

• Pure JavaScript implementation, making it easy to use in web browsers
• Supports QR code detection from images and video streams
• Lightweight and fast, suitable for real-time applications

Cons of jsQR

• Limited to QR code reading/detection only
• May have lower performance compared to native implementations
• Less comprehensive documentation and examples

Code Comparison

QR-Code-generator (Java):

QrCode qr = QrCode.encodeText("Hello, world!", QrCode.Ecc.MEDIUM);
BufferedImage img = qr.toImage(4, 10);
ImageIO.write(img, "png", new File("qr-code.png"));

jsQR (JavaScript):

const code = jsQR(imageData.data, imageData.width, imageData.height);
if (code) {
  console.log("Found QR code", code.data);
}

Key Differences

• QR-Code-generator supports both encoding and decoding, while jsQR focuses on decoding
• QR-Code-generator is available in multiple programming languages, jsQR is JavaScript-only
• jsQR is more suited for web-based applications, while QR-Code-generator offers broader platform support
• QR-Code-generator provides more customization options for QR code generation

Pros of qrcodejs

• Lightweight and easy to use, with a simple API
• Supports various output formats (canvas, table, SVG)
• No external dependencies, making it ideal for client-side use

Cons of qrcodejs

• Limited customization options compared to QR-Code-generator
• Less comprehensive documentation and examples
• May not support advanced QR code features or error correction levels

Code Comparison

QR-Code-generator (C++):

QrCode qr = QrCode::encodeText("Hello, world!", QrCode::Ecc::MEDIUM);
for (int y = 0; y < qr.getSize(); y++) {
    for (int x = 0; x < qr.getSize(); x++) {
        std::cout << (qr.getModule(x, y) ? "##" : "  ");
    }
    std::cout << std::endl;
}

qrcodejs (JavaScript):

var qrcode = new QRCode(document.getElementById("qrcode"), {
    text: "Hello, world!",
    width: 128,
    height: 128,
    colorDark : "#000000",
    colorLight : "#ffffff",
    correctLevel : QRCode.CorrectLevel.M
});

QR-Code-generator offers more low-level control and supports multiple programming languages, while qrcodejs provides a simpler, JavaScript-focused solution for web applications. QR-Code-generator is better suited for complex projects requiring fine-tuned control, whereas qrcodejs is ideal for quick implementation in web environments.

Pros of qrcode-generator

• Supports multiple programming languages (JavaScript, Java, and others)
• Provides a simple API for easy integration
• Includes a demo page for quick testing and visualization

Cons of qrcode-generator

• Less actively maintained (last update was in 2020)
• Limited documentation and examples
• Fewer features compared to QR-Code-generator

Code Comparison

QR-Code-generator (C++):

QrCode qr = QrCode::encodeText("Hello, world!", QrCode::Ecc::MEDIUM);
for (int y = 0; y < qr.getSize(); y++) {
    for (int x = 0; x < qr.getSize(); x++) {
        std::cout << (qr.getModule(x, y) ? "##" : "  ");
    }
    std::cout << std::endl;
}

qrcode-generator (JavaScript):

var qr = qrcode(0, 'M');
qr.addData('Hello, world!');
qr.make();
var moduleCount = qr.getModuleCount();
for (var row = 0; row < moduleCount; row++) {
    for (var col = 0; col < moduleCount; col++) {
        process.stdout.write(qr.isDark(row, col) ? '##' : '  ');
    }
    console.log();
}

Both libraries offer similar functionality for generating QR codes, but QR-Code-generator provides a more comprehensive set of features and is actively maintained. qrcode-generator, while simpler to use, may lack some advanced options and recent updates.

Pros of python-qrcode

• Pure Python implementation, making it easier to install and use across different platforms
• Supports SVG output, allowing for scalable QR codes
• Includes a command-line interface for quick QR code generation

Cons of python-qrcode

• Generally slower performance compared to the C++ implementation of QR-Code-generator
• Limited to QR code generation only, while QR-Code-generator supports both encoding and decoding

Code Comparison

python-qrcode:

import qrcode
qr = qrcode.QRCode(version=1, box_size=10, border=5)
qr.add_data('Hello, World!')
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="white")

QR-Code-generator:

#include <QrCode.hpp>
using qrcodegen::QrCode;
const QrCode qr = QrCode::encodeText("Hello, World!", QrCode::Ecc::MEDIUM);
std::string svg = qr.toSvgString(4);

Both libraries offer straightforward ways to generate QR codes, with python-qrcode providing a more Pythonic interface and QR-Code-generator offering a C++ implementation for potentially better performance. The choice between them depends on the specific requirements of the project, such as language preference, performance needs, and desired output formats.