5 ways to process images & PDFs with Gemini AI in n8n

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

How it works Many users have asked in the support forum about different methods to analyze images and PDF documents with Google Gemini AI in n8n. This workflow answers that question by demonstratin...

Best for

Document Extraction automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.manualtrigger, @n8n/n8n-nodes-langchain.lmchatgooglegemini, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.httprequest, n8n-nodes-base.splitout, n8n-nodes-base.extractfromfile, n8n-nodes-base.splitinbatches, n8n-nodes-base.set

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Julian Kaiser.

Original n8n.io source

1.1 Workflow description

Title: 5 ways to process images & PDFs with Gemini AI in n8n
Workflow name: 5 ways to process images & PDFs with Gemini AI in n8n

How it works

Many users have asked in the support forum about different methods to analyze images and PDF documents with Google Gemini AI in n8n. This workflow answers that question by demonstrating five different approaches:

Single image with auto binary passthrough - The simplest approach using AI Agent's automatic binary handling
Multiple images with predefined prompts - For customized analysis with different instructions per image
Native n8n item-by-item processing - For handling multiple items using n8n's standard workflow paradigm
PDF analysis via direct API - For document analysis and text extraction
Image analysis via direct API - For direct control over API parameters
Each method has advantages depending on your specific use case, data volume, and customization needs.

Set up steps

Setup time: ~5-10 minutes

You'll need:

A Google Gemini API key
n8n with HTTP Request and AI Agent nodes
Important: For the HTTP Request nodes making direct API calls to Gemini (Methods 3, 4, and 5), you'll need to set up Query Authentication with your Gemini API key. Add a parameter named "key" with your API key value in the Query Auth section of these nodes.

I'll updated this if I find better ways. Also let me know if you know other ways. Eager to learn :)

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - When clicking ‘Test workflow’

Type / Role: n8n-nodes-base.manualTrigger - manualTrigger
Config choices: Version 1

Block 2 - Google Gemini Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 3 - AI Agent

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 1.7

Block 4 - Get image from unsplash2

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 5 - Split Out

Type / Role: n8n-nodes-base.splitOut - splitOut
Config choices: Version 1

Block 6 - Get image from unsplash3

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 7 - Transform to base

Type / Role: n8n-nodes-base.extractFromFile - extractFromFile
Config choices: Version 1

Block 8 - Call Gemini API1

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 9 - Loop Over Items

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 10 - AI Agent2

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 1.7

Block 11 - Google Gemini Chat Model1

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 12 - Get image from unsplash4

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 13 - Get PDF file

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 14 - Get image from unsplash

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 15 - Call Gemini API with PDF

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 16 - Call Gemini API with Image

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 17 - Transform to base64 (image)

Type / Role: n8n-nodes-base.extractFromFile - extractFromFile
Config choices: Version 1

Block 18 - Transform to base64 (pdf)

Type / Role: n8n-nodes-base.extractFromFile - extractFromFile
Config choices: Version 1

Block 19 - Define Multiple Image URLs

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 20 - Split Out to multiple items

Type / Role: n8n-nodes-base.splitOut - splitOut
Config choices: Version 1

Block 21 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 22 - Define URLs And Prompts

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 23 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 24 - Filter (optional)

Type / Role: n8n-nodes-base.filter - filter
Config choices: Version 2.2

Showing the first 24 of 28 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	5 ways to process images & PDFs with Gemini AI in n8n
Complexity	advanced
Nodes	28
Categories	Document Extraction, Multimodal AI
Author	Julian Kaiser
Published	04 Mar 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/3078/3078.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Document Extraction workflows Multimodal AI workflows

Frequently asked questions

What does 5 ways to process images & PDFs with Gemini AI in n8n do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Document Extraction, Multimodal AI use case.

Julian Kaiser

11 workflows

Nodes

n8n-nodes-base.manualtrigger @n8n/n8n-nodes-langchain.lmchatgooglegemini @n8n/n8n-nodes-langchain.agent n8n-nodes-base.httprequest n8n-nodes-base.splitout n8n-nodes-base.extractfromfile n8n-nodes-base.splitinbatches n8n-nodes-base.set

Complexity

advanced

Published 04 Mar 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/3078/3078.json

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5 ways to process images & PDFs with Gemini AI in n8n

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Set up steps

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - When clicking ‘Test workflow’

Block 2 - Google Gemini Chat Model

Block 3 - AI Agent

Block 4 - Get image from unsplash2

Block 5 - Split Out

Block 6 - Get image from unsplash3

Block 7 - Transform to base

Block 8 - Call Gemini API1

Block 9 - Loop Over Items

Block 10 - AI Agent2

Block 11 - Google Gemini Chat Model1

Block 12 - Get image from unsplash4

Block 13 - Get PDF file

Block 14 - Get image from unsplash

Block 15 - Call Gemini API with PDF

Block 16 - Call Gemini API with Image

Block 17 - Transform to base64 (image)

Block 18 - Transform to base64 (pdf)

Block 19 - Define Multiple Image URLs

Block 20 - Split Out to multiple items

Block 21 - Sticky Note

Block 22 - Define URLs And Prompts

Block 23 - Sticky Note1

Block 24 - Filter (optional)

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions