Split Binary Data into Individual Files

This workflow addresses a common challenge in n8n: handling binary data objects that aren't in a simple array format, such as multiple attachments from incoming emails named 'attachment_0', 'attachment_1', etc. The core Function node iterates through all incoming items and their binary properties, creating a new item for each binary file. Each output item includes a JSON object with the filename and a 'data' binary key containing the file data.

Benefits include simplifying downstream processing—no more complex looping over non-array binaries. It saves significant time when building automations for email parsing, file uploads, or multi-attachment handling, making workflows more maintainable and scalable.

Use cases: Process email attachments for CRM integration (e.g., saving files to cloud storage), extract images/PDFs from forms, or prepare binaries for AI analysis. The example uses an HTTP download and decompression of a ZIP file to demonstrate, but in production, connect it after nodes like IMAP Email, Gmail, or webhook triggers.

Nodes include Manual Trigger for testing, HTTP Request for sample data, Compression to unzip, the key Function splitter, and a Sticky Note for guidance.