Chilkat for .NET Framework Downloads

The downloads on this page are the full-versions.
Chilkat components are fully functional for 30-day evaluations.

Chilkat Available in NuGet

Chilkat .NET Packages are also available via NuGet.
  • View Chilkat NuGet packages at https://www.nuget.org/profiles/chilkat
  • Choose "chilkat-x64" if targeting x64 or "Any CPU" with the "Prefer 32-bit" checkbox unchecked in project settings.
  • Choose "chilkat-win32" if targeting x86 or "Any CPU" with the "Prefer 32-bit" checkbox checked in project settings.
  • An "incorrect format" error indicates the wrong choice was made.
  • Important: Read about the Common Errors before downloading and testing for the 1st time.

.NET Framework vs .NET Core

Note: The downloads on this web page are for using Chilkat with the .NET Framework, not .NET Core. If your application is .NET Core (such as .NET 6.0, .NET 8.0, etc.) then use the appropriate Chilkat .NET Core Package from NuGet.


Using Chilkat in ASP.NET on Shared Hosting

The Chilkat .NET assembly requires full trust. Add the following to your web.config:

<system.web>
    ...
    <trust level="Full" />
    ...
</system.web>

Chilkat .NET Framework Downloads

All Chilkat .NET classes are contained in a single assembly (DLL)

Important: Read about the Common Errors before downloading and testing for the 1st time.

v10.0.0 27-Sep-2024sha256: a8032981c3c0ba5985f179af2c79d2aae64ed354e8fa56476172895ee77d61f5
arm64 Chilkat .NET for the 4.8.* Frameworks

v10.0.0 27-Sep-2024sha256: afb94e2c7f54d00b3f75ef4451268138e7a5ae89bfeab0333f01f0495639c69f
64-bit Chilkat .NET for the 4.8.* Frameworks

v10.0.0 27-Sep-2024sha256: 106ef7f32750acfe5caff780aac7fe77860bd676c4d70841b1d67f029c155e66
32-bit Chilkat .NET for the 4.8.* Frameworks

v10.0.0 27-Sep-2024sha256: d88ea64b9d71358412a237774fe563816f0889e59368c256bc7bd5997e391e68
64-bit Chilkat .NET for the 4.7.* Frameworks

v10.0.0 27-Sep-2024sha256: d5f66c663a8dbd8f121dd82ec3308f5dcb6a5599a3228995fe7c791be7a76c48
32-bit Chilkat .NET for the 4.7.* Frameworks

v10.0.0 27-Sep-2024sha256: da35ec44aa9eeb69c485a9d9c54b4787ef39acc55e958c2855aabdaa54dc5fa8
64-bit Chilkat .NET for the 4.6.* Frameworks (VS2017)

v10.0.0 27-Sep-2024sha256: 1fabe197df929e6f61df5d753bc7a53a2c760e2f2619e39f8a7ee82493ba62dd
32-bit Chilkat .NET for the 4.6.* Frameworks (VS2017)

v10.0.0 27-Sep-2024sha256: 7635cb4a263174077262e0005c5cbbd10bb2e91e2fa9b1dffcbdd7840daa7c30
64-bit Chilkat .NET for the 4.6.* Frameworks (VS 2015)

v10.0.0 27-Sep-2024sha256: 342048f814f34f4dc1f37d8ab8114924f717bc6ddcb8d595396cda4d2352e6ab
32-bit Chilkat .NET for the 4.6.* Frameworks (VS 2015)

v10.0.0 27-Sep-2024sha256: 64443ff24a92f14e24011e4905199eacae2565371118a63b2ee9aba3c761cde9
64-bit Chilkat .NET for the 4.5.* .NET Frameworks
(Visual Studio 2013)

v10.0.0 27-Sep-2024sha256: 3d6ad5f7da968215fcc345b2de594c0491d592790529b93f672bbfdebd6f0f4a
32-bit Chilkat .NET for the 4.5.* .NET Frameworks
(Visual Studio 2013)

v10.0.0 27-Sep-2024sha256: 51605b5dcf218a2708224157715a404dc4c8a11455483e3ba8e97148756689bd
64-bit Chilkat .NET for the 4.5.* .NET Frameworks
(Visual Studio 2012/2013)

v10.0.0 27-Sep-2024sha256: c044d847b0712a57551631b55236a7cfdc16a3c3cfcf842ff5aa0cb22f138273
32-bit Chilkat .NET for the 4.5.* .NET Frameworks
(Visual Studio 2012/2013)

v10.0.0 27-Sep-2024sha256: 9ab26f3e6c45e6d65d79c02c25ca76485c0bbd01ba8e7fd35e24ed787193e085
64-bit Chilkat .NET for the 4.0 Framework
(Visual Studio 2010)

v10.0.0 27-Sep-2024sha256: acd8f770389c590ea7aed49c5f2e009f3e20570fbc799c73ce54db15cdcfee4f
32-bit Chilkat .NET for the 4.0 Framework
(Visual Studio 2010)

v10.0.0 27-Sep-2024sha256: d8ef1fcbc3a176cb7506802dd645c3f1e41f88fdc2f0c94390c8232ff9e50239
64-bit Chilkat .NET for the 2.0/3.5 Frameworks
(Visual Studio 2005/2008)

v10.0.0 27-Sep-2024sha256: ff1043c342f9738080a9939b508d761cf7c83ebc8e3402698fd2f5739f08f42e
32-bit Chilkat .NET for the 2.0/3.5 Frameworks
(Visual Studio 2005/2008)


Install Instructions

Download and unzip to any directory. There is no "install". To use the Chilkat .NET assembly in a Visual Studio project, add a reference to the Chilkat DLL (such as ChilkatDotNet48.dll). (When adding the reference, Browse to the location of the Chilkat DLL and select it.)

Common Error #1: Incorrect Format

An application running in a 32-bit process must load the 32-bit Chilkat DLL, and an application running in a 64-bit process must load the 64-bit DLL. If a 32-bit process tries to load a 64-bit DLL, or the reverse, then an "Incorrect Format" error occurs:

Could not load file or assembly 'ChilkatDotNet**' or one of its dependencies. 
An attempt was made to load a program with an incorrect format.

Solutions:

  • Target your app for x86 instead of "Any CPU". Your application will run as a 32-bit process regardless of the machine architecture and you can always use the 32-bit Chilkat assembly.
  • In your Project Properties (for Visual Studio 2011 or later), in the Build tab, look for the "Prefer 32-bit" checkbox. If it is checked, then your application will always run as 32-bit, even if "Any CPU" is targeted. Thus you will always need to reference the 32-bit assembly.
  • If your app targets "Any CPU", then it will run as a 32-bit process on a 32-bit computer, or a 64-bit process on a 64-bit computer (assuming "Prefer 32-bit") is unchecked. In this case, make sure to deploy the 32-bit Chilkat assembly w/ your app on 32-bit systems, and deploy the 64-bit Chilkat assembly to 64-bit systems. Nowadays, 32-bit Windows computers are very old and unlikely to be encountered. For in-house applications where you know all computers are 64-bit (i.e. not extremely old), then it is sufficient to assume 64-bit, Any CPU, and "Prefer 32-bit" unchecked.
  • If your app is running within ASP.NET or a Windows Service and you're not quite sure whether it's 32-bit or 64-bit, then install the 32-bit Chilkat assembly in the 32-bit GAC (Global Assembly Cache), and also install the 64-bit Chilkat assembly into the 64-bit GAC. The .NET runtime will automatically look in the correct GAC and will find the correct assembly.

Common Error #2: The specified module could not be found.

Could not load file or assembly 'ChilkatDotNet**.dll' or one of its dependencies. 
The specified module could not be found.

This error occurs if the needed VC++ runtime redist is not already installed on the system.
The solution is to download and install the needed runtime redist from Microsoft VC++ Runtime Redist Downloads.

  • If using the .NET 4.6, 4.7, or 4.8 Frameworks, choose the Microsoft VC++ runtime redist download for Visual Studio 2015, 2017 and 2019 (there is a single download for all three).
  • If using .NET 4.5 with VS2013, choose the "Visual Studio 2013 (VC++ 12.0)" runtime redist.
  • If using .NET 4.5 with VS2012, choose the "Visual Studio 2012 (VC++ 11.0)" runtime redist.
  • If using .NET 4.0, choose the "Visual Studio 2010 (VC++ 10.0) SP1" runtime redist.
  • If using .NET 2.0, download the VC++ 2005 runtime redist from VC++ 2005 Runtime Redist

Reference Documentation

Online Reference Documentation is located at Chilkat Documentation.

Sample Code

Online examples are located at Chilkat Example Code