> For the complete documentation index, see [llms.txt](https://docs.cascade.io/cascade/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cascade.io/cascade/tools/cleaning/flattenjson.md).

# Flatten Json

Flatten JSON offers the ability to flatten JSON objects in one JSON column into new broken out columns in your dataset. You can also select the max level to flatten if you want to flatten to deeper levels in the JSON string.

### Input/Output

| Inputs                                                                                                                                                                                         | Outputs                                                     |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------- |
| <p><strong>Column</strong> - column in dataset with JSON string</p><p><strong>Max Level to Flatten (optional) -</strong> max number of levels to normalize. If none, normalizes all levels</p> | Table with original columns and new flattened JSON columns. |

### Example

Let's say we have a table with a "Hierarchy" column that contains JSON strings:

{% embed url="<https://datawrapper.dwcdn.net/yq93I/2>" %}

We can choose to flatten the "Hierarchy" column and will get the following result with a new "Category" column: &#x20;

{% embed url="<https://datawrapper.dwcdn.net/3FwdK/1>" %}


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