QRCoder.Core 2.0.0

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher. .NET Framework 4.8 This package targets .NET Framework 4.8. The package is compatible with this framework or higher. 
dotnet add package QRCoder.Core --version 2.0.0
                    


                    

                
NuGet\Install-Package QRCoder.Core -Version 2.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="QRCoder.Core" Version="2.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="QRCoder.Core" Version="2.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="QRCoder.Core" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add QRCoder.Core --version 2.0.0
                    


                    

                
#r "nuget: QRCoder.Core, 2.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package QRCoder.Core@2.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=QRCoder.Core&version=2.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=QRCoder.Core&version=2.0.0
                    


                            Install as a Cake Tool

QRCoder.Core

A cross-platform .NET library for QR Code generation using SkiaSharp. Compatible with Windows, Linux, macOS, and mobile (Xamarin / MAUI).

Based on QRCoder. Supports .NET Standard 2.1, .NET 8.0, .NET 10.0, and .NET Framework 4.8.

Quick Start

using QRCoder.Core;

// Generate QR code data
using var generator = new QRCodeGenerator();
using var data = generator.CreateQrCode("https://github.com/afonsoft/QRCoder.Core",
    QRCodeGenerator.ECCLevel.M);

// Render as PNG bytes (cross-platform, no System.Drawing needed)
using var png = new PngByteQRCode(data);
byte[] pngBytes = png.GetGraphic(10);
File.WriteAllBytes("qrcode.png", pngBytes);

Output Formats

Format Class Example
PNG PngByteQRCode new PngByteQRCode(data).GetGraphic(10) → byte[]
SVG SvgQRCode new SvgQRCode(data).GetGraphic(10) → string
PDF PdfByteQRCode new PdfByteQRCode(data).GetGraphic(5) → byte[]
ASCII ASCIIQRCode new ASCIIQRCode(data).GetGraphic(1) → string
Base64 Base64QRCode new Base64QRCode(data).GetGraphic(10) → string
SKBitmap QRCode new QRCode(data).GetGraphic(10) → SKBitmap
Postscript PostscriptQRCode new PostscriptQRCode(data).GetGraphic(5) → string
Artistic ArtQRCode new ArtQRCode(data).GetGraphic(10) → SKBitmap
BMP BitmapByteQRCode new BitmapByteQRCode(data).GetGraphic(10) → byte[]

Multiple Formats Example

using QRCoder.Core;

using var gen = new QRCodeGenerator();
using var data = gen.CreateQrCode("Hello World", QRCodeGenerator.ECCLevel.M);

// SVG
using var svg = new SvgQRCode(data);
string svgString = svg.GetGraphic(10);

// ASCII (terminal)
using var ascii = new ASCIIQRCode(data);
Console.WriteLine(ascii.GetGraphic(1));

// PDF
using var pdf = new PdfByteQRCode(data);
byte[] pdfBytes = pdf.GetGraphic(5);

// With custom colors
using var qr = new QRCode(data);
using var bitmap = qr.GetGraphic(10, "#1a1a2e", "#e0e0e0");

Payload Types

Generate formatted QR code content for common use cases:

using QRCoder.Core;

using var gen = new QRCodeGenerator();

// Wi-Fi
var wifi = new PayloadGenerator.WiFi("MyNetwork", "MyPassword",
    PayloadGenerator.WiFi.Authentication.WPA);
using var wifiData = gen.CreateQrCode(wifi.ToString(), QRCodeGenerator.ECCLevel.M);

// URL
var url = new PayloadGenerator.Url("https://github.com/afonsoft/QRCoder.Core");
using var urlData = gen.CreateQrCode(url.ToString(), QRCodeGenerator.ECCLevel.M);

// Email
var mail = new PayloadGenerator.Mail("test@example.com", "Subject", "Body");
using var mailData = gen.CreateQrCode(mail.ToString(), QRCodeGenerator.ECCLevel.M);

// Phone Number
var phone = new PayloadGenerator.PhoneNumber("+1234567890");
using var phoneData = gen.CreateQrCode(phone.ToString(), QRCodeGenerator.ECCLevel.M);

// Contact Card (vCard)
var contact = new PayloadGenerator.ContactData(
    PayloadGenerator.ContactData.ContactOutputType.VCard3,
    "Doe", "John", phone: "+1234567890", email: "john@example.com");
using var contactData = gen.CreateQrCode(contact.ToString(), QRCodeGenerator.ECCLevel.M);

Supported payloads: URL, WiFi, Mail, SMS, PhoneNumber, MMS, Geolocation, CalendarEvent, ContactData, Bitcoin, Girocode, BezahlCode, SwissQrCode, OneTimePassword, ShadowSocksConfig, Bookmark, SkypeCall, WhatsAppMessage, and more.

Error Correction Levels

Level Recovery Use Case
ECCLevel.L ~7% Maximum data capacity
ECCLevel.M ~15% General purpose (recommended)
ECCLevel.Q ~25% Higher reliability
ECCLevel.H ~30% Maximum recovery (logos, artistic QR)

Documentation & Source

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
.NET Framework net48 is compatible.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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GitHub repositories

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Version Downloads Last Updated
2.0.0 48 5/10/2026
1.0.8 4,057 2/20/2026
1.0.3 899,137 3/28/2024
1.0.2 21,673 3/12/2024
1.0.1 21,939 12/22/2023
1.0.0 21,653 12/22/2023

Release version 2.0.0