scalatra/scalatra

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

circe/circe

Yet another JSON library for Scala

finagle/finch

Scala combinator library for building Finagle HTTP services

json4s/json4s

JSON library

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

typelevel/jawn

Jawn is for parsing jay-sawn (JSON)

non/jawn

Jawn is for parsing jay-sawn (JSON)

playframework/play-json

The Play JSON library

gnieh/diffson

A scala diff/patch library for Json

zio/zio-json

Fast, secure JSON library with tight ZIO integration.

agourlay/cornichon

Scala DSL for testing HTTP JSON API

fthomas/crjdt

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

jto/validation

validation api extracted from play

julienrf/play-json-derived-codecs

travisbrown/dhallj

Dhall for Java