Gemini 3 Image & PDF Extractor (Google Drive → Gemini 3 → Summary)

Automatically summarize newly uploaded images or PDF reports using Google Gemini 3, triggered directly from a Google Drive folder.
Perfect for anyone who needs fast AI-powered analysis of financial reports, charts, screenshots, or scanned documents.

🎥 Watch the full step-by-step video tutorial:
https://www.youtube.com/watch?v=UuWYT_uXiw0

What this template does

This workflow watches a Google Drive folder for new files and automatically:

1. Detects new uploaded files

• Uses Google Drive Trigger

• Watches a specific folder for fileCreated events

Filters by MIME type:

• image/png

• image/webp

• application/pdf

1. Downloads the file automatically

Depending on the file type:

Images → Download via HTTP Request → Send to Gemini 3 Vision

PDFs → Download via HTTP Request → Extract content → Send to Gemini 3

1. Analyzes content using Gemini 3

Two separate processing lanes:

🖼️ Image Lane

Image is sent to Gemini 3 (Vision / Image Analyze)

Extracts textual + visual meaning from charts, diagrams, or screenshots

Passes structured output to an AI Analyst Agent

Agent summarizes and highlights top 3 findings

📄 PDF Lane

PDF is downloaded

Text is extracted using Extract From File

Processed using Gemini 3 via OpenRouter Chat Model

AI Analyst Agent summarizes charts/tables and extracts insights

Why this workflow is useful

Save hours manually reading PDFs, charts, and screenshots

Convert dense financial or operational documents into digestible insights

Great for:

Financial analysts

Operations teams

Market researchers

Content & reporting teams

Anyone receiving frequent reports via Drive

Requirements

Before using this template, you will need:

Google Drive OAuth credential
(for Drive trigger + file download)

Gemini 3 / PaLM or OpenRouter API key

(Optional) Update folder ID to your own Google Drive target folder

⚠️ No credentials are included in this template. Add them manually after importing it.

Node Overview
Google Drive Trigger

Watches a specific Drive folder for newly added files

Provides metadata like webContentLink and MIME type

Filter by Type (IF Node)

Routes files to Image lane or PDF lane

png or webp → Image

pdf → PDF

🖼️ Image Processing Lane

Download Image (HTTP Request)

Analyze Image (Gemini Vision)

Analyzer Agent

Summarizes findings

Highlights actionable insights

Powered by OpenRouter Gemini 3

📄 PDF Processing Lane

Download PDF (HTTP Request)

Extract From File → PDF

Analyzer Agent (PDF)

Summarizes extracted chart/report information

Highlights key takeaways

Setup Guide

Import the template into your n8n workspace

Open Google Drive Trigger

Select your Drive OAuth credential

Replace folder ID with your target folder

Open Gemini 3 / OpenRouter AI Model nodes

Add your API credentials

Test by uploading:

A PNG/WebP chart screenshot

A multi-page PDF report

Check the execution to view summary outputs

Customization Ideas

Add email delivery (send the summary to yourself daily)

Save summaries into:

Google Sheets

Notion

Slack channels

n8n Data Tables

Add a second agent to convert summaries into:

Weekly reports

PowerPoint slides

Slack-ready bullet points

Add classification logic:

Revenue reports

Marketing analytics

Product dashboards

Financial charts

Troubleshooting

Trigger not firing?
Confirm your Drive OAuth credential has read access to the folder.

Gemini errors?
Ensure your model ID matches your API provider:

models/gemini-3-pro-preview

google/gemini-3-pro-preview

PDF extraction empty?
Check if the file contains selectable text or only images.
(You can add OCR if needed.)