Templates / 🛠️ Change Binary MimeType/Extension

🛠️ Change Binary MimeType/Extension

Ready for 3.0

by Lucas Peyrin ✓ · 2,591 views · created 2025-06-23 · File Management

Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.

What this workflow does

This workflow has 4 nodes and runs when another workflow calls it. It uses only n8n's built-in nodes.

How it runs

Trigger: When another workflow calls it.

SET OUTPUT FILE NAME (Edit Fields (Set)): sets 2 fields: binary_key, output_file_name
Extract from File: extracts data from a file (binary to propery)
Change Binary Data Type (Code): runs custom JavaScript code

Before you upgrade to n8n 3.0

Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.

Nodes used (4)

Extract from Filen8n-nodes-base.extractFromFile
Edit Fields (Set)n8n-nodes-base.set
Coden8n-nodes-base.code
Execute Workflow Triggern8n-nodes-base.executeWorkflowTrigger

From the author

How it works This workflow changes the file name, and therefore the extension and MIME type, of any binary file passed to it. This is perfect for converting file formats on the fly, like turning a Telegram voice message (.oga) into an MP3 for an AI…
Excerpt from Lucas Peyrin's description on n8n.io.

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