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title: The Null block
approved: 2025-07-30T00:00:00.000Z
topictype: reference
slug: docs/postman-flows/reference/blocks/null
max-toc-depth: 2
ux: v12
-------

When a flow runs, the **Null** block sends a null value from its output port. Null values can be useful in many cases, including handling API responses with null value fields and clearing [inserted](/docs/postman-flows/reference/blocks/overview/#insert-data-blocks-into-other-blocks) data block values.

## Output

The **Null** block has a single output port that sends a null value.

## Setup

Connect the **Null** block's output port to another block's input port. It will send a null value to that block.

## Example

To see the **Null** block in an example flow, check out [Flow Snippets: Null](https://www.postman.com/postman/flows-snippets/flow/63bc6e4a82ae416b9e6bc108).