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

# Fanout Node

> Process array items in parallel.

Fanout takes a JSON array as input and runs the downstream node once per element, in parallel. When all parallel runs complete, the results merge back into a JSON array and flow onward.

The fan-in happens automatically: the node immediately following the fanned-out node collects all results into an array, preserving order. No manual collection step needed.

**Example:** You have a list of 50 customer questions. Fanout splits the array, the downstream Prompt node processes each question independently and in parallel, and the results recombine into a single array of answers.