Repository Index

FlatBuffers: Memory Efficient Serialization Library

• flatbuffers
• serialization
• serialization-library
• json-parser

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

• json
• json-parser
• simd
• avx2

A Java serialization/deserialization library to convert Java Objects into JSON and back

Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input

• csv
• javascript
• csv-parser

Ultralightweight JSON parser in ANSI C

High-performance Protocol Buffers for JavaScript and TypeScript. Conformant through Edition 2026, and unusually versatile. No protoc required.

• javascript
• typescript
• protobuf
• protocol-buffers

A modern JSON library for Kotlin and Java.

A querystring parser and serializer with nesting support

• javascript
• encoding
• querystrings
• nodejs

JSON in JavaScript

JSON5 — JSON for Humans

• json
• json5

Parse and stringify URL query strings

• query-string
• urlsearchparams
• url
• stringify

JavaScript YAML parser and dumper. Very fast.

Java binary serialization and cloning: fast, efficient, automatic

• java
• serialization
• cloning
• kryo

Safely serialize JavaScript expressions to a superset of JSON, which includes Dates, BigInts, and more.

• superjson
• javascript
• json
• blitzjs

XML to JavaScript object converter.

• coffeescript
• parsing
• xml-parser
• xml

A streaming approach to JSON. Oboe.js speeds up web applications by providing parsed objects before the response completes.

A reference implementation of a JSON package in Java.

• hacktoberfest
• java
• json
• public-domain

A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.

• cross-language
• fast
• jit
• multiple-language

Smarter YAML front matter parser, used by metalsmith, Gatsby, Netlify, Assemble, mapbox-gl, phenomic, vuejs vitepress, TinaCMS, Shopify Polaris, Ant Design, Astro, hashicorp, garden, slidev, saber, sourcegraph, and many others. Simple to use, and battle tested. Parses YAML by default but can also parse JSON Front Matter, Coffee Front Matter, TOML Front Matter, and has support for custom parsers. Please follow gray-matter's author: https://github.com/jonschlinkert

• yaml
• front-matter
• matter
• javascript

gRPC and protocol buffers for Android, Kotlin, Swift and Java.

🚄 FASTJSON2 is a Java JSON library with excellent performance.

• json
• fastjson
• json-parser
• jsonb

Base64 implementation for JavaScript

Full featured CSV parser with simple api and tested against large datasets.

• csv
• parser
• nodejs
• streaming

Jodd! Lightweight. Java. Zero dependencies. Use what you like.

• java
• jodd
• micro-framework
• ioc