A lightweight QR code generator for Go with zero dependencies. Simple, fast, and pure Go.

• No external dependencies
• Standard QR code generation (version 1-40)
• Error correction (L, M, Q, H)
• Simple API

go get github.com/erencanucarr/goQR

package main

import (
    "fmt"
    "log"
    "github.com/erencanucarr/goQR"
)

func main() {
    qr, err := goQR.GenerateQR("Hello, World!", goQR.Low)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(qr.ToString())
}

• GenerateQR(data string, errorLevel ErrorCorrectionLevel) (*QRCode, error)
• QRCode.ToString() string (prints QR code to terminal)
• QRCode.GetMatrix() [][]bool (raw matrix)
• QRCode.GetVersion() int
• QRCode.GetErrorLevel() ErrorCorrectionLevel

MIT

This library implements the following steps of the QR code algorithm:

1. Data Encoding: Convert data to binary format
2. Error Correction: Generate error correction codes using Reed-Solomon coding
3. Matrix Creation: Create QR code matrix
4. Finder Pattern's: Add finder patterns to QR code corners
5. Alignment Pattern's: Add alignment patterns
6. Timing Pattern's: Add timing patterns
7. Format Information: Add error correction level and masking information
8. Masking: Apply masking to improve QR code readability

This library uses GF(2^8) Galois field arithmetic for Reed-Solomon error correction:

• Primitive polynomial: x^8 + x^4 + x^3 + x^2 + 1
• Field size: 256
• Generator polynomials: Pre-calculated for different error correction levels

To test this library:

go test

For benchmark tests:

go test -bench=.

For more examples, check out the example/ directory:

cd example
go run main.go

This library uses optimized algorithms:

• Small data (< 100 characters): ~1ms
• Medium data (100-500 characters): ~5ms
• Large data (> 500 characters): ~10-50ms

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push your changes (git push origin feature/amazing-feature)
5. Create a pull request

This project is licensed under the MIT License. See LICENSE for details.

• v1.0.0: Initial version - Basic QR code generation features

• GitHub: @erencanucarr
• Project: goQR

This library was developed following the QR code standard (ISO/IEC 18004). No third-party libraries were used.