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

# To JSON Block

> Convert any value into a JSON string representation

<Frame>
  <img src="https://mintcdn.com/odella/PGZ7enNCqh0mvwj_/block-reference/assets/to_json_light.png?fit=max&auto=format&n=PGZ7enNCqh0mvwj_&q=85&s=b67f96f00737304a624bbf285b369766" alt="To JSON Block Screenshot" className="block dark:hidden" width="602" height="340" data-path="block-reference/assets/to_json_light.png" />

  <img src="https://mintcdn.com/odella/PGZ7enNCqh0mvwj_/block-reference/assets/to_json_dark.png?fit=max&auto=format&n=PGZ7enNCqh0mvwj_&q=85&s=248fe87576308598c695cc87b6e9b351" alt="To JSON Block Screenshot" className="hidden dark:block" width="590" height="310" data-path="block-reference/assets/to_json_dark.png" />
</Frame>

## Overview

The To JSON Block converts any input value into its JSON string representation. This is useful for serializing data structures, debugging, or preparing data for storage or transmission in a text format.

## Key Features

* Converts any JavaScript value to a JSON string
* Preserves data structure and types
* Handles complex nested objects and arrays
* Useful for data serialization and debugging

## Inputs

<ParamField path="input" type="any" required>
  The value to convert to JSON. Can be any type including objects, arrays, strings, numbers, booleans, or null.
</ParamField>

## Outputs

<ResponseField name="output" type="string">
  The JSON string representation of the input value.
</ResponseField>

## Example: Convert an Object to JSON

1. Create an Object Block with values:
   ```json theme={null}
   {
     "name": "John Smith",
     "age": 30,
     "hobbies": ["reading", "hiking"]
   }
   ```
2. Add a To JSON Block and connect the Object Block to its `input`.
3. Run the flow. The output will be the stringified JSON:
   ```json theme={null}
   {"name":"John Smith","age":30,"hobbies":["reading","hiking"]}
   ```

## Error Handling

* Handles circular references by throwing an error
* Non-JSON-serializable values (like functions) will be omitted
* Undefined values will be omitted from objects

## FAQ

<AccordionGroup>
  <Accordion title="What types of values can be converted to JSON?">
    Most JavaScript values can be converted including objects, arrays, strings, numbers, booleans, and null. Functions, undefined values, and circular references cannot be converted to JSON.
  </Accordion>

  <Accordion title="Will the output JSON be formatted/pretty-printed?">
    No, the output JSON will be compact without extra whitespace. To format the JSON, you can use a Code Block with JSON.stringify's space parameter.
  </Accordion>

  <Accordion title="How are special values handled?">
    * undefined values are omitted from objects
    * Functions are omitted from objects
    * Dates are converted to ISO strings
    * NaN and Infinity become null
  </Accordion>
</AccordionGroup>

## See Also

* [Object Block](/block-reference/data/object)
* [Code Block](/block-reference/advanced/code)