Generate technical n8n workflow reports with GPT-4.1 and Google Docs

Who is this workflow for?

This workflow is designed for technical teams, automation owners, process auditors, and anyone who needs to document n8n workflows in a consistent, fast, and professional way—without manual work.

What problem does it solve? / Use case

Documenting n8n workflows is often slow and error-prone: you need to review nodes, configurations, connections, internal logic, and embedded code.

This workflow automates that process by generating a complete technical report, structured and ready to share, ensuring documentation is:

consistent
easy to update
easy to review
accessible in Google Drive

What this workflow does

Lets you select an n8n workflow to document
Extracts its structure, nodes, connections, and settings
Normalizes the JSON to remove noise and keep what matters
Generates a HTML technical report using an LLM (OpenAI GPT-4.1)
Detects whether Code nodes exist
If Code nodes exist, analyzes their logic and adds an extra technical section
Creates a final Google Docs document inside a Google Drive folder

High-level flow

Manual workflow start
Target workflow selection
Workflow normalization (cleanup + structure)
Main report generation with OpenAI
Code node extraction
Condition: Code nodes exist or not
(Optional) technical analysis of Code nodes with OpenAI
Merge main report + code analysis
Create the final document in Google Docs

Setup

OpenAI

Configure OpenAI credentials (API Key).

The workflow uses OpenAI nodes to:

generate the main report
analyze Code nodes (if any)

Google Drive

Configure Google Drive OAuth2 credentials with write permissions
Define a destination folder using a folder ID (e.g., YOUR_FOLDER_ID)
The workflow uploads the final HTML as a Google Docs document

n8n (access to the target workflow)

If your instance requires it, configure access to read internal workflows.

The workflow fetches the selected workflow using an n8n Get Workflow node.

How to customize this workflow

Report format:** adjust the prompt in the Generate Report node to change sections, style, or level of detail
Output folder:** replace YOUR_FOLDER_ID with the real Drive folder ID
Documentation strategy:** generate shorter reports for small workflows
split large reports if the workflow is very big
Automated triggering:** replace the manual start with a webhook trigger if you want to use an external application

Final outcome

A system that automatically generates a professional technical Google Docs document containing:

workflow description
global configuration
node-by-node breakdown
routing logic (conditions and branches)
required credentials
operational requirements
risks and observations
additional Code node analysis (if applicable)

Do you want this workflow in Spanish?

📧 jrvillaverde@virodria.es
🔗 https://www.linkedin.com/in/ramonvillaverde