GNU Make
CMake
SCons
SBT
npm
Gradle
Brunch
Ninja Build
FreeFormatter
JSONLint
JSONFormatter.org
Code Beautify JSON Validator
ExtendsClass JSON Formatter
JSON Formatter & Validator
CodeBeautify
Site24x7 JSON Formatter and Validator
CMake - CMake is an open-source, cross-platform family of tools designed to build, test and package software.
JSONLint - JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
SCons - SCons is an Open Source software construction toolโthat is, a next-generation build tool.
JSONFormatter.org - Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON
SBT - SBT is a build tool for Scala, like Ant or Maven but with hieroglyphics.
Code Beautify JSON Validator - Code Beautyโs JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.