# JSON Type

The JSON data type stores any valid JavaScript Object Notation data values, including objects, maps, arrays, and nested types. Refer to [Using JSON](https://docs.singlestore.com/db/v9.1/create-a-database/using-json.md) for more information.

Although the JSON type can be declared with a maximum length of up to 4GB, the size of any single JSON value you insert or assign is limited by `max_allowed_packet`. By default, `max_allowed_packet` is 100 MB and can be increased to up to 1 GB.

| Data Type | Size                 | Size (Not Null)      |
| --------- | -------------------- | -------------------- |
| JSON      | 20 bytes + data size | 16 bytes + data size |

## Valid JSON Values

SingleStore accepts any value that conforms to the JSON standard ([RFC 8259](https://datatracker.ietf.org/doc/html/rfc8259)) as a valid JSON value.

| JSON Value Type | Example                     |
| --------------- | --------------------------- |
| Object          | `{"name":"Alice","age":30}` |
| Array           | `[1, 2, 3]`                 |
| String          | `"hello"`                   |
| Number          | `123`,`3.14`,`-1e10`        |
| Boolean         | `true`,`false`              |
| Null            | `null`                      |

***

Modified at: June 10, 2026

Source: [/db/v9.1/reference/sql-reference/data-types/json-type/](https://docs.singlestore.com/db/v9.1/reference/sql-reference/data-types/json-type/)

(An index of the documentation is available at /llms.txt)