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JSON can be verbose, especially for large datasets. This verbosity can make JSON files larger than other data interchange formats, leading to increased bandwidth usage.
The lack of comments in JSON can make it challenging to add explanatory notes or annotations within the data.
No Comments:

JSON does not support comments, which can be a limitation when documenting or explaining the data structure.
No Support for Binary Data:

JSON is a text-based format, and it does not provide built-in support for encoding binary data. This limitation can result in inefficiencies when dealing with binary data compared to formats like Protocol Buffers or MessagePack.
Limited Data Types:

JSON has a limited set of data types (string, number, boolean, array, object, null). While this simplicity contributes to its ease of use, it might not be as expressive as other formats in certain scenarios.