awesome-repositories.com
Blog
MCP
awesome-repositories.com

Discover the best open-source repositories with AI-powered search.

ExploreCurated searchesOpen-source alternativesSelf-hosted softwareBlogSitemap
ProjectMCP serverAboutHow we rankPress
LegalPrivacyTerms
© 2026 Bringes Technology SRL·VAT RO45896025·hello@awesome-repositories.com

C# JSON Libraries

Ranking updated Jul 13, 2026

For a high performance JSON library for C#, the first results are jamesnk/newtonsoft.json (Newtonsoft.Json is the industry-standard JSON library for ), neuecc/utf8json (This library provides high-performance, zero-allocation JSON serialization for ) and stoplightio/spectral (This is a linting and validation tool for API specifications rather than a general-purpose JSON processing library for the ). miloyip/rapidjson and streamich/json-joy round out the shortlist. Compare the match explanations and check the project documentation against your requirements.

We curate open-source GitHub repositories matching “best c sharp json libraries”. Results are ranked by relevance to your query — pick filters below to narrow, or refine with AI.

C# JSON Libraries

Find the best repos with AI.We'll search the best matching repositories with AI.
  • jamesnk/newtonsoft.jsonJamesNK avatar

    JamesNK/Newtonsoft.Json

    11,262View on GitHub↗

    Newtonsoft.Json is a data processing utility for the .NET ecosystem designed to facilitate the transformation and exchange of information. It functions as a serialization library and object mapping framework, enabling the conversion of complex application objects into formatted JSON strings and the reconstruction of structured objects from raw JSON data. The library distinguishes itself through a flexible architecture that supports both strongly-typed class mapping and a dynamic object model for schema-less data manipulation. It employs reflection-based metadata mapping to automate property a

    Newtonsoft.Json is the industry-standard JSON library for .NET, offering comprehensive support for high-performance serialization, LINQ-to-JSON, and extensive custom converter capabilities.

    C#JSON Serialization LibrariesJSON Data ParsersJSON Serializers
    View on GitHub↗11,262
  • neuecc/utf8jsonneuecc avatar

    neuecc/Utf8Json

    2,386View on GitHub↗

    Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).

    This library provides high-performance, zero-allocation JSON serialization for .NET environments, making it a strong choice for performance-critical applications despite lacking some of the broader features like schema validation.

    C#JSON and YAML ParsersSerializationSerialization Libraries
    View on GitHub↗2,386
  • stoplightio/spectralstoplightio avatar

    stoplightio/spectral

    3,012View on GitHub↗

    Spectral is a programmable linting engine and validation tool designed to enforce style guidelines and schema correctness within OpenAPI specifications and JSON configuration files. It functions as a rule-based validator that analyzes structured text files to ensure data consistency and adherence to predefined constraints. The engine utilizes a configuration-driven execution model, allowing users to manage pluggable rule sets and integrate JSON Schema definitions. It supports the creation of custom function-based rules to define complex validation logic beyond static declarations. The projec

    This is a linting and validation tool for API specifications rather than a general-purpose JSON processing library for the .NET ecosystem.

    TypeScriptJSON Schema ValidationJSON-Schema
    View on GitHub↗3,012
  • miloyip/rapidjsonmiloyip avatar

    miloyip/rapidjson

    15,095View on GitHub↗

    RapidJSON is a high-performance C++ library used for parsing and generating JSON data. It provides both document object model and stream-based interfaces to transform JSON strings into structured data and vice versa. The library includes a JSON schema validator to verify that documents conform to predefined rules and a Unicode transcoder for converting strings between UTF-8, UTF-16, and UTF-32 encodings. It also supports relaxed parsing for non-standard JSON containing comments or trailing commas. Additional capabilities cover JSON pointer navigation for locating specific values and string s

    This is a high-performance JSON library, but it is written in C++ and intended for C++ projects rather than the .NET ecosystem requested.

    C++JSON-SchemaJSON
    View on GitHub↗15,095
  • streamich/json-joystreamich avatar

    streamich/json-joy

    1,079View on GitHub↗

    json-joy is a comprehensive library for building real-time collaborative applications and distributed systems. It provides a robust framework for managing shared JSON-like data structures that automatically merge concurrent edits from multiple users, ensuring consistent state across all replicas without requiring a central coordination server. The project distinguishes itself through a high-performance approach to data handling, utilizing conflict-free replicated data types and logical clock-based synchronization to maintain data integrity. It includes a specialized engine for navigating and

    This library is designed for real-time collaborative state synchronization and CRDTs rather than general-purpose JSON serialization for the .NET ecosystem, and it is primarily implemented in TypeScript.

    TypeScriptJSON Document Manipulation
    View on GitHub↗1,079
  • jqlang/jqjqlang avatar

    jqlang/jq

    34,901View on GitHub↗

    This project is a command-line processor designed for the parsing, filtering, and transformation of structured data streams. It functions as a declarative programming environment that treats data as immutable streams, allowing users to perform complex structural modifications through the composition of small, reusable functions. By utilizing a recursive tree traversal engine, the system enables the navigation, inspection, and modification of deeply nested hierarchical data structures. The engine distinguishes itself through a stream-oriented architecture that processes input records one by on

    This is a command-line utility and domain-specific language for processing JSON, rather than a .NET library that provides serialization, LINQ support, or AOT compatibility for C# applications.

    CLarge Data Streamers
    View on GitHub↗34,901
Compare the top 10 at a glance
RepositoryStarsLanguageLicenseLast push
jamesnk/newtonsoft.json11.3KC#mitDec 30, 2025
neuecc/utf8json2.4KC#MITMay 16, 2022
stoplightio/spectral3KTypeScriptapache-2.0Feb 20, 2026
miloyip/rapidjson15.1KC++NOASSERTIONFeb 5, 2025
streamich/json-joy1.1KTypeScriptNOASSERTIONJun 2, 2026
jqlang/jq34.9KCNOASSERTIONJun 16, 2026

Related searches

  • a high performance serialization library for C#
  • a high performance JSON library for Java
  • a high performance JSON library for Go
  • a lightweight json library for C++
  • a high performance JSON parsing library
  • a C# library for making HTTP requests
  • a library for data compression in C#
  • a library for implementing GraphQL in C#