Top 20 NuGet json Packages

Microsoft.Extensions.Configuration (appsettings.json) support for Serilog.
Easy-to-use typesafe REST API client library, which is simple and customisable.
.NET's fastest JSON, JSV and CSV Text Serializers. Fast, Light, Resilient. Contains ServiceStack's high-performance text-processing powers, for more info see:
NEST 6.x uses an internalized Json.NET serializer. This package enables serialization using your own custom Json.NET serializer
Lightweight and implementation-free interfaces for DTO's, providers and adapters.
A fluent, portable, testable HTTP client library.
Monadic JSON serialization/deserialization library for F#
ASP.NET Core support for JSON PATCH.
ASP.NET Core MVC formatters for JSON input and output and for JSON PATCH input using Json.NET.
A simple library for working with JSON.
The Couchbase authored new and improved client for .NET based languages! Package supports both .NET Core and Full Frameworks 4.5 and greater.
Jwt.Net, a JWT (JSON Web Token) implementation for .NET
App Metrics Formatters for health check results to JSON using Newtonsoft.Json.
This is the Flurl.Http package, repackaged with strongly named assemblies. See for the official project.
Chilkat .NET Core Class Library
WampSharp Newtonsoft.Json support
JSON Schema reader, generator and validator for .NET
C# Library
Extensions to VelocityDB for efficient LINQ index/BTree queries, AzureSession file API usage with Microsoft Azure, import/export to/from CSV and JSON, Sync, GeoHash, Compressed Bitmap and RTree.
Type-safe, easy and power configuration framework for .NET developers