How to Add Comments in JSON Files: A Complete Guide

JSON (JavaScript Object Notation) has become the standard data interchange format for web applications and APIs. However, one common frustration developers face is that standard JSON doesn't support comments. This limitation can make complex JSON structures difficult to understand and maintain. In this comprehensive guide, we'll explore various approaches to add comments to JSON files, helping you write more maintainable and self-documenting code.

Why Comments Matter in JSON

Comments serve as essential documentation within your code. They explain the purpose of specific data structures, clarify complex nested objects, and provide context for future developers. When working with large JSON files, especially those exchanged between teams or used in production environments, comments can significantly improve code readability and reduce the learning curve for new team members.

Common Approaches to Commenting in JSON

Since standard JSON doesn't natively support comments, developers have developed several workarounds:

1. Using non-standard properties like _comment or __comment
2. Employing JSON5 which extends JSON to support comments
3. Using separate documentation files
4. Leveraging tools that strip comments before parsing

JSON5: The Extended JSON Solution

JSON5 is a popular extension of JSON that adds support for comments, single