---
title: "Set Property on JSON"
slug: "set-property-on-json"
updated: 2026-08-14T21:29:11Z
published: 2026-08-14T21:29:11Z
canonical: "documentation.decisions.com/set-property-on-json"
---

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

# Set Property on JSON

| ## Step Details |
| --- |
| **Introduced in Version** | 9.30.0 |
| **Last Modified in Version** | 9.30.0 |
| **Location** | Data > JSON |

The **Set Property on JSON** step sets the value of a property in a JSON string. Use this step when a Flow needs to update a specific property in existing JSON data during execution.

---

## Properties

#### Parameters

| Property | Description | Data Type |
| --- | --- | --- |
| Type | Select the data type of the value being set. | --- |
| Property Name | Enter the name of the JSON property to add or update. | --- |

#### Inputs

| Property | Description | Data Type |
| --- | --- | --- |
| Json Text | Specify the JSON string where the property value is set including the text. | String |
| Value | Specify the value to assign to the selected JSON property. The value matches the selected **Type**. | --- |

#### Outputs

| Property | Description | Data Type |
| --- | --- | --- |
| SetPropertyonJSON1_Output | Returns the updated JSON string after the property value is set. | String |

#### ![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/Set%20Property%20on%20JSON(1).png)

## Common Use Cases

Common use cases for **Set Property on JSON** include:

- Updating an existing property value in a JSON string during Flow execution.
- Adding a property to a JSON string when the property does not already exist.
- Preparing or modifying a JSON payload before sending it to an API.
- Updating status, user, account, or transaction values in JSON data.
- Adding values collected from Forms, Rules, or previous Flow steps into an existing JSON object.
- Standardizing JSON output before passing it to another step or integration.
- Dynamically changing configuration or request data stored as JSON.