Process multiple files with forms: a tutorial on binary data and loops

Name: Process multiple files with forms: a tutorial on binary data and loops
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Author: Wyeth

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Let a user load multiple files with a Form node, and process the binary data. A very important workflow for many tools.

This is a learning example of several core concepts that are hard to grasp in n8n:

$binary data
Loop and $runIndex
Split Out

The Save File deomonstrates how to access the binary data correctly, but could be swapped to POST the files to an AI, for example.

Wyeth

0 workflows

Nodes

set gmail telegram agent google-gemini

Complexity

intermediate

Published 28 Jun 2025

Likes 0

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