circe/circe

Yet another JSON library for Scala

scalatra/scalatra

Tiny Scala high-performance, async web framework, inspired by Sinatra

finagle/finch

Scala combinator library for building Finagle HTTP services

json4s/json4s

A single AST to be used by other scala json libraries

spray/spray-json

A lightweight, clean and simple JSON implementation in Scala

ngs-doo/dsl-json

High performance JVM JSON library

hseeberger/akka-http-json

Integrate some of the best JSON libs in Scala with Akka HTTP

argonaut-io/argonaut

Purely functional JSON parser and library in scala.

wvlet/airframe

Essential Building Blocks for Scala

plokhotnyuk/jsoniter-scala

Scala macros for compile-time generation of safe and ultra-fast JSON codecs

non/jawn

Jawn is for parsing jay-sawn (JSON)

gnieh/diffson

A scala diff/patch library for Json

playframework/play-json

The Play JSON library

agourlay/cornichon

Scala DSL for testing HTTP JSON API

jto/validation

validation api extracted from play

fthomas/crjdt

A conflict-free replicated JSON datatype (CRDT) in Scala

julienrf/play-json-derived-codecs

sirthias/borer

Efficient CBOR and JSON (de)serialization in Scala

mkotsur/aws-lambda-scala

Writing AWS Lambdas in Scala

pathikrit/dijon

A Dynamically Typed Scala Json Library