IconCaptcha 1.0.0

There is a newer version of this package available.
See the version list below for details.
dotnet add package IconCaptcha --version 1.0.0
NuGet\Install-Package IconCaptcha -Version 1.0.0
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="IconCaptcha" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add IconCaptcha --version 1.0.0
#r "nuget: IconCaptcha, 1.0.0"
#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.
// Install IconCaptcha as a Cake Addin
#addin nuget:?package=IconCaptcha&version=1.0.0

// Install IconCaptcha as a Cake Tool
#tool nuget:?package=IconCaptcha&version=1.0.0

IconCaptcha Logo

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IconCaptcha is a faster and more user-friendly captcha than most other captchas. You no longer have to read any annoying text-images, with IconCaptcha you only have to compare two images and select the image which is only present once.

Besides being user-friendly, IconCaptcha is also developer-friendly. With just a few steps you can get the captcha up and running. Even developers new to ASP.NET can easily install IconCaptcha. The demo web application contains all the code needed to get the captcha working.

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  • User Friendly: The captcha uses easily understandable images instead of hard to read texts to complete the captcha.
  • Server-side validation: Any validation done by the captcha will be performed on the server-side instead of the client-side.
  • Events: Events are triggered at various points in the code, allowing you to hook into them and execute custom code if necessary.
  • Themes: Select the design of the captcha without having to ever touch the stylesheet.
  • SASS: The project contains a SASS file, allowing you to easily style and compile the stylesheet.
  • Supports IE: The captcha supports Internet Explorer 8 and up.


  • .NET framework >= 4.0
  • ASP.NET MVC >= 5.0
  • jQuery >= 1.12.3

Note: Other .NET framework and ASP.NET versions may work, however the code was tested against the versions stated above.

Usage, Implementation & options

For instructions on how to properly implement IconCaptcha, please visit the following pages:


The icons used in this project are made by Webalys.


This project is licensed under the MIT license.

Product Compatible and additional computed target framework versions.
.NET Framework net40 is compatible.  net403 was computed.  net45 was computed.  net451 was computed.  net452 was computed.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
3.0.1 139 1/16/2024
3.0.0 106 1/13/2024
1.0.0 1,719 8/7/2018

Initial release of the ASP.NET version of IconCaptcha.