I had just the same problem in Visual Studio 2015. But Utamaru's solution worked for me.
Make a folder: Assets/Plugins where you put the *.dll file and add it as a reference.
To add a reference you highlight the Analyzers in the Solution Explorer in Visual Studio and under Project > Add Reference you can find your *.dll file located in Assets/Plugin by browsing to it.
GitHub
github.com › applejag › Newtonsoft.Json-for-Unity
GitHub - applejag/Newtonsoft.Json-for-Unity: Newtonsoft.Json (Json.NET) 10.0.3, 11.0.2, 12.0.3, & 13.0.1 for Unity IL2CPP builds, available via Unity Package Manager · GitHub
October 6, 2023 - Newtonsoft.Json (Json.NET) 10.0.3, 11.0.2, 12.0.3, & 13.0.1 for Unity IL2CPP builds, available via Unity Package Manager - applejag/Newtonsoft.Json-for-Unity
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Unity
discussions.unity.com › unity engine
Newtonsoft Json package - Unity Engine - Unity Discussions
March 9, 2020 - So now that Unity has brought in Newtonsoft.Json.dll in their own package, the docs say: “To avoid assembly clashes, please use this package if you intend to use Newtonsoft Json.” But the docs for the package say: "This is a package intended for internal Unity Development Projects and as such this package is not supported.
c# - Adding Json.Net to a Unity3D project - Stack Overflow
To add a reference you highlight ... your *.dll file located in Assets/Plugin by browsing to it. ... Sign up to request clarification or add additional context in comments. ... I also had to restart Unity. 2018-05-26T00:16:34.573Z+00:00 ... Or if you dont require Newtonsoft.Json (Json.NET), ... More on stackoverflow.com
How to install NewtonSoft Json in unity or Visual studio code?
Hello. I’m transitioning to Json saving trying following the Brian’s tutorial but I must admit i’m a little bit confuse according NewtonSoft Json. I assume I haven’t any Json install in my unity version: or Json: And I don’t understand at all how to install it. More on community.gamedev.tv
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April 22, 2025Newtonsoft Json package - Unity Engine - Unity Discussions
So now that Unity has brought in Newtonsoft.Json.dll in their own package, the docs say: “To avoid assembly clashes, please use this package if you intend to use Newtonsoft Json.” But the docs for the package say: "This is a package intended for internal Unity Development Projects and as ... More on forum.unity.com
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September 3, 2020Newtonsoft JSON package missing after moving project? - Unity Engine - Unity Discussions
Not sure where to put this. I moved my project folder from one laptop to another. Now I am getting errors that the Newtonsoft namespace could not be found. I did not have any Newtonsoft folders in my project, so I guess it must have been in the packages? But I tried to re-add Newtonsoft JSON ... More on discussions.unity.com
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April 25, 2022Videos
Unity
docs.unity3d.com › Packages › com.unity.nuget.newtonsoft-json@2.0 › manual › index.html
Newtonsoft Json Unity Package | Newtonsoft Json | 2.0.2
This is a Unity package for Newtonsoft Json and corresponds to Newtonsoft.Json version 12.0.301.
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I had just the same problem in Visual Studio 2015. But Utamaru's solution worked for me.
Make a folder: Assets/Plugins where you put the *.dll file and add it as a reference.
To add a reference you highlight the Analyzers in the Solution Explorer in Visual Studio and under Project > Add Reference you can find your *.dll file located in Assets/Plugin by browsing to it.
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For support in built versions, recommended to use one of following
Json.NET v13.0github.com/jilleJr/Newtonsoft.Json-for-UnityJson.NET v9.0github.com/SaladLab/Json.Net.Unity3DJson.NET v8.0parentelement.com/assets/json_net_unityJson.NET v7.0nuget.org/packages/Unity.Newtonsoft.Json/
Or if you dont require Newtonsoft.Json (Json.NET), here's some other alternatives (all works in Unity, I've omitted libraries that don't, and there's a lot of 'em):
OdinSerializergithub.com/TeamSirenix/odin-serializerUTF8Jsongithub.com/neuecc/Utf8JsonFastJSONassetstore.unity.com/packages/tools/input-management/fastjson-27220UltimateJsonassetstore.unity.com/packages/tools/integration/ultimate-json-60845SimpleJsonwiki.unity3d.com/index.php/SimpleJSONLitJsongithub.com/Mervill/UnityLitJsonFullSerializergithub.com/jacobdufault/fullserializerprotobuf-netgithub.com/protobuf-net/protobuf-net
There is quite the table of candy to select from. Choose well young padawan~
GameDev.tv
community.gamedev.tv › unity courses › ask
How to install NewtonSoft Json in unity or Visual studio code? - Ask - GameDev.tv
April 22, 2025 - Hello. I’m transitioning to Json saving trying following the Brian’s tutorial but I must admit i’m a little bit confuse according NewtonSoft Json. I assume I haven’t any Json install in my unity version: or Json: …
NuGet
nuget.org › packages › Unity.Newtonsoft.Json
NuGet Gallery | Unity.Newtonsoft.Json 7.0.0
March 23, 2015 - <PackageReference Include="Unity.Newtonsoft.Json" Version="7.0.0" />
Unity
docs.unity3d.com › Packages › com.unity.nuget.newtonsoft-json@3.2 › manual › index.html
Newtonsoft Json Unity Package | Newtonsoft Json | 3.2.2
This is a Unity package for Newtonsoft Json and corresponds to Newtonsoft.Json version 13.0.2.
Unity
discussions.unity.com › unity engine
Newtonsoft JSON package missing after moving project? - Unity Engine - Unity Discussions
April 25, 2022 - Not sure where to put this. I moved my project folder from one laptop to another. Now I am getting errors that the Newtonsoft namespace could not be found. I did not have any Newtonsoft folders in my project, so I guess it must have been in the packages? But I tried to re-add Newtonsoft JSON ...
Unity
docs.unity3d.com › Packages › com.unity.nuget.newtonsoft-json@3.0 › manual › index.html
Newtonsoft Json Unity Package | Newtonsoft Json | 3.0.2
This is a Unity package for Newtonsoft Json and corresponds to Newtonsoft.Json version 13.0.1.
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Visual Studio in the context of Unity should just be regarded as a text-editor. Unity more or less handles the Visual Studio solution and generally overrides anything you do to it.
Unity has their own Newtonsoft package you can install via the package manager.
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And generally speaking, any package you install via the IDE will not be recognized by the Unity project. Regular NPM packages are installed globally whereas Unity packages or any other asset must be part of the Unity project either located under the Assets tree or installed via Package Manager windo…
Medium
rehtse-studio.medium.com › made-with-unity-newtonsofts-json-net-b64236d59e76
Made With Unity | Newtonsoft’s Json.NET | by Rehtse Studio | Medium
October 6, 2022 - I’m holding on to the other two ... Newtonsoft package. On Unity go to Windows->Package Manager, once the Package Manager window opens, go to Add package from git URL, type com.unity.nuget.newtonsoft-json press Add and ...
Open Collective
opencollective.com › newtonsoftjson-for-unity
Newtonsoft.Json for Unity - Open Collective
June 1, 2020 - For the .NET community and all of us that just want to parse JSON within our Unity projects. Using Newtonsoft.Json inside the Unity3D game engine is simple at first. Just push in the .dll and start coding. Perhaps even use some NuGet downloader to keep the binaries out of your git repository.
Reddit
reddit.com › r/unity3d › newtonsoft.json v12.0.1 for unity via unity package manager
r/Unity3D on Reddit: Newtonsoft.Json v12.0.1 for Unity via Unity Package Manager
July 18, 2019 - Here's a Newtonsoft.Json v12.0.1 package for Unity with support for built projects and even IL2CPP built projects (such as WebGL, Android, iOS). Not only being new version of Json.NET for Unity, it's now shipped with this "new" nice tool called Unity Package Manager! UPM (Unity Package Manager) needs more focus. It's such a great tool we needed ages ago. High time to start using it and stop pushing DLL's to our repositories.
Unity
docs.unity3d.com › Packages › com.unity.nuget.newtonsoft-json@2.0 › changelog › CHANGELOG.html
Changelog | Newtonsoft Json | 2.0.2 - Unity - Manual
October 11, 2021 - Updated to bug fix release 12.0.2 of Newtonsoft Json. Updated package description. Use .net standard 2.0 version of the dll. Renamed the dll to match the assembly name. Users will need to update their assembly references. No notable changes from the previous preview release. Remove the unused asmdef file and make it such that the dll needs to be explicitly included. Update the documentation for the package and the package description to state that this package is for internal Unity ...
Unity
docs.unity3d.com › Packages › com.unity.nuget.newtonsoft-json@2.0 › index.html
Home Page. | Newtonsoft Json | 2.0.2
November 11, 2021 - Home Page · This is the home page for this package · Back to top · Copyright © 2023 Unity Technologies — Terms of use · Legal · Do Not Sell or Share My Personal Information · Your Privacy Choices (Cookie Settings)
OpenUPM
openupm.com › packages › com.newtonsoft.json
com.newtonsoft.json | com.newtonsoft.json | Unity Package Manager (UPM) | OpenUPM
Unity package manager setup for Newtonsoft's JSON library
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1.In Unity, place the Newtonsoft.Json.dll file into the Assets/Plugins folder
2.In Visual Studio, highlight Analyzers in the in Solution Explorer window.
3.Go to Project-> Add Reference and choose your project directory followed by Assets/Plugin. That's it.
Optional:
In Unity 5.3, Unity added native support of Json serialization. You can simply use that to convert to Json and back to class.
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Go to:
Window -> Package Manager
Click on the plus button
Add Package from GIT URL > com.unity.nuget.newtonsoft-json
GitHub
github.com › applejag › Newtonsoft.Json-for-Unity › wiki › Install-official-via-UPM
Install official via UPM · applejag/Newtonsoft.Json-for-Unity Wiki · GitHub
March 3, 2022 - Newtonsoft.Json (Json.NET) 10.0.3, 11.0.2, 12.0.3, & 13.0.1 for Unity IL2CPP builds, available via Unity Package Manager - applejag/Newtonsoft.Json-for-Unity
Author applejag