> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aseeflow.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Configuring JSON Handling

Spin can be configured to change JSON parsing, writing and mapping settings, for example to tolerate documents that are not strictly compliant to the standard. Spin uses [Jackson](http://wiki.fasterxml.com/JacksonHome) to handle JSON. The JSON data format therefore uses an instance of `com.fasterxml.jackson.databind.ObjectMapper` that can be configured using Spin's [configuration mechanism](/reference/spin/extending-spin#configuring-data-formats).

The data format class to register a configurator for is `org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormat`. An instance of this class provides a setter for an `ObjectMapper` that can be used to replace the default object mapper. This logic goes into a configurator class that implements the interface `org.camunda.spin.spi.DataFormatConfigurator`. Please refer to the [Jackson's documentation](https://fasterxml.github.io/jackson-databind/javadoc/2.4/) on what configuration options are available.