No, comments are not allowed in JSON (JavaScript Object Notation) as per the JSON specification. JSON is designed to be a data interchange format, and comments are not considered valid JSON syntax. If you attempt to include comments in a JSON file, it would result in a syntax error.

If you need to include explanatory or descriptive information in a JSON file, you should use a separate documentation or add comments in the code or documentation associated with the use of that JSON data. JSON is meant to be a concise and easy-to-parse data format, and comments are intentionally omitted for simplicity and interoperability.