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

plokhotnyuk/jsoniter-scala

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

hseeberger/akka-http-json

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

wvlet/airframe

Essential Building Blocks for Scala

argonaut-io/argonaut

Purely functional JSON parser and library in scala.

typelevel/jawn

Jawn is for parsing jay-sawn (JSON)

zio/zio-json

Fast, secure JSON library with tight ZIO integration.

playframework/play-json

The Play JSON library

fthomas/crjdt

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

gnieh/diffson

A scala diff/patch library for Json

agourlay/cornichon

Scala DSL for testing HTTP JSON API

jto/validation

validation api extracted from play

sirthias/borer

Efficient CBOR and JSON (de)serialization in Scala

jvican/dijon

A Dynamically Typed Scala Json Library

mkotsur/aws-lambda-scala

Writing AWS Lambdas in Scala