Json Parser GitHub Repositories (2026) · Open Source Tools

JSON for Modern C++

Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks

Optimized JSON

A micro-library of stream components for building custom JSON and JSONC processing pipelines with a minimal memory footprint — parse, filter, and transform JSON far larger than available memory with a SAX-inspired token API, on Node.js or Web Streams.

Fast, convenient JSON serialization and parsing in C++

head/tail for structured data - summarize/preview JSON/YAML and source code

Framework for representing, validating, querying, and manipulating generic JSON values in Swift 6. Supported are standards such as JSON Text Sequences (RFC 7464), JSON Pointer (RFC 6901), JSON Path (RFC 9535), JSON Patch (RFC 6902), JSON Merge Patch (RFC 7396), and JSON Schema.

facil.io C STL - a Server Toolbox Library for C, including JSON processing, hash maps, dynamic arrays, binary strings and more.

Tcl bindings for Yet Another JSON Library

Supercharge Swift's Codable implementations with macros meta-programming.

🚄 FASTJSON2 is a Java JSON library with excellent performance.