Analyze Legal Documents with GPT & o4-mini plus Gmail & Google Sheets

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Important notice

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

1. Workflow Overview

Description This workflow lets you upload a PDF document and automatically analyze it with AI. It extracts the text, summarizes the content, flags key clauses or risks, and then delivers the result...

Best for

AI Summarization automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.extractfromfile, n8n-nodes-base.webhook, @n8n/n8n-nodes-langchain.agent, @n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.gmail, n8n-nodes-base.code, @n8n/n8n-nodes-langchain.chainllm, n8n-nodes-base.respondtowebhook

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Analyze Legal Documents with GPT & o4-mini plus Gmail & Google Sheets
Workflow name: Analyze Legal Documents with GPT & o4-mini plus Gmail & Google Sheets

Description

This workflow lets you upload a PDF document and automatically analyze it with AI. It extracts the text, summarizes the content, flags key clauses or risks, and then delivers the results via Gmail while also storing them in Google Sheets for tracking.

It’s designed for legal, compliance, or contract review use cases, but can be adapted for any document analysis scenario. Test it here: PDF Document Assistant

🔹 Instructions / Setup

Webhook Input

Upload a PDF document by sending it to the webhook URL.

Extract from File

The workflow extracts text from the uploaded PDF.

Pre-processing (Code Node)

Cleans and formats extracted text to remove unwanted line breaks or artifacts.

Basic LLM Chain (OpenAI)

Summarizes or restructures document content using OpenAI.
Adjust the prompt inside to fit your analysis needs (summary, risk flags, clause extraction).

Post-processing (Code Node)

Further structures the AI output into a clean format (JSON, HTML, or plain text).

AI Agent (OpenAI)

Runs deeper analysis, answers questions, and extracts insights.

Gmail

Sends the results to a recipient.
Configure Gmail credentials and set your recipient address.

Google Sheets

Appends results to a Google Sheet for record-keeping or audits.

Respond to Webhook

Sends a quick acknowledgment back to confirm the document was received.

🔹 Credentials Needed

OpenAI API key (for Chat Model + Agent)
Gmail account (OAuth2)
Google Sheets account (OAuth2)

🔹 Example Use Case

Upload a contract PDF → workflow extracts clauses → AI flags risky terms → Gmail sends formatted summary → results stored in Google Sheets.

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 - Extract from File

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

Block 2 - Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2

Block 3 - AI Agent

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 2

Block 4 - OpenAI Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 5 - Gmail1

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 6 - Code

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 7 - OpenAI Chat Model1

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 8 - Basic LLM Chain

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

Block 9 - Code1

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 10 - Respond to Webhook

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.3

Block 11 - Google Sheets

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 12 - Sticky Note1

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

Block 13 - Sticky Note2

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

Block 14 - Sticky Note

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

Block 15 - Sticky Note3

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

Block 16 - Sticky Note4

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

Block 17 - Sticky Note5

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

Block 18 - Sticky Note6

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

3. Summary Table

Workflow	Analyze Legal Documents with GPT & o4-mini plus Gmail & Google Sheets
Complexity	advanced
Nodes	18
Categories	AI Summarization, Multimodal AI
Author	Swot.AI
Published	19 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7610/7610.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 AI Summarization workflows Multimodal AI workflows

Frequently asked questions

What does Analyze Legal Documents with GPT & o4-mini plus Gmail & Google Sheets 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 AI Summarization, Multimodal AI use case.

Swot.AI

1 workflow

Nodes

n8n-nodes-base.extractfromfile n8n-nodes-base.webhook @n8n/n8n-nodes-langchain.agent @n8n/n8n-nodes-langchain.lmchatopenai n8n-nodes-base.gmail n8n-nodes-base.code @n8n/n8n-nodes-langchain.chainllm n8n-nodes-base.respondtowebhook

Complexity

advanced

Published 19 Aug 2025

Likes 0

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Install path: /data/workflows/7610/7610.json

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Analyze Legal Documents with GPT & o4-mini plus Gmail & Google Sheets

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Extract from File

Block 2 - Webhook

Block 3 - AI Agent

Block 4 - OpenAI Chat Model

Block 5 - Gmail1

Block 6 - Code

Block 7 - OpenAI Chat Model1

Block 8 - Basic LLM Chain

Block 9 - Code1

Block 10 - Respond to Webhook

Block 11 - Google Sheets

Block 12 - Sticky Note1

Block 13 - Sticky Note2

Block 14 - Sticky Note

Block 15 - Sticky Note3

Block 16 - Sticky Note4

Block 17 - Sticky Note5

Block 18 - Sticky Note6

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