Check out a code editor for development and modification of your projects and apps on a Mac. Apply a variety of tools to the newly created or pre-existing code based on JavaScript, TypeScript, and Node. Integrate a series of extensions and enable or disable each of them.
Visual Studio Code is a lightweight but powerful source code editor which runs on your desktop and is available for Windows, macOS and Linux. It comes with built-in support for JavaScript, TypeScript and Node.js and has a rich ecosystem of extensions for other languages (such as C++, C#, Java, Python, PHP, Go) and runtimes (such as .NET and Unity).
Blinged JSON Validator is a free app to validate JSON files with syntax highlighting, whitespace indentation, error messaging, and hotkeys.