**No**, comments of the form `//…` or `/*…*/` are not allowed in JSON. This answer is based on:
- https://www.json.org
- RFC 4627: The application/json Media Type for JavaScript Object
Notation (JSON)
- RFC 8259 The JavaScript Object Notation (JSON) Data Interchange
Format (supercedes RFCs 4627, 7158, 7159)
**No**, comments of the form `//…` or `/*…*/` are not allowed in JSON. This answer is based on:
* https://www.json.org
* [RFC 4627](http://www.ietf.org/rfc/rfc4627.txt):
The `application/json` Media Type for JavaScript Object Notation (JSON)
* [RFC 8259](https://www.rfc-editor.org/rfc/rfc8259) The JavaScript Object Notation (JSON) Data Interchange Format (supercedes RFCs 4627, 7158, 7159)