Review PDF contract risks with a form, Google Gemini, Sheets, and Slack

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1. Workflow Overview

Who is this for Legal teams, operations managers, and freelancers who review contracts regularly and want to catch risky clauses before signing. Ideal for small teams without dedicated legal counse...

Best for

Document Extraction automation workflows
AI Summarization automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.formtrigger, n8n-nodes-base.code, @n8n/n8n-nodes-langchain.chainllm, @n8n/n8n-nodes-langchain.lmchatgooglegemini, n8n-nodes-base.googlesheets, n8n-nodes-base.if, n8n-nodes-base.slack

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Review PDF contract risks with a form, Google Gemini, Sheets, and Slack
Workflow name: Review PDF contract risks with a form, Google Gemini, Sheets, and Slack

Who is this for

Legal teams, operations managers, and freelancers who review contracts regularly and want to catch risky clauses before signing. Ideal for small teams without dedicated legal counsel.

What this workflow does

This workflow automates contract risk analysis using AI. A user uploads a PDF contract through a web form and selects the contract type. The Code node extracts text from the PDF, then Google Gemini analyzes the full contract for risky clauses, unfavorable terms, and missing legal protections. Each clause gets a severity rating (high, medium, low) with a suggested fix. The parsed results are logged to Google Sheets for tracking, and if the overall risk score exceeds your threshold, a Slack alert fires immediately so nothing slips through.

How to set up

Get a free Google Gemini API key from Google AI Studio
Connect your Google Sheets account and create a spreadsheet called "Contract Reviews"
Connect your Slack workspace and select the channel for risk alerts
Activate the workflow and share the form URL with your team

Requirements

Google Gemini API key (free tier available)
Google Sheets account
Slack workspace with a channel for alerts
n8n instance (self-hosted or cloud)

How to customize

Edit the AI prompt in the "Analyze Contract" node to focus on specific clause types like indemnification or IP assignment
Change the risk threshold in the "Check Risk Level" node (default triggers on scores above 7)
Add columns to the Sheets node for additional tracking fields like reviewer name or department

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 - Overview

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

Block 2 - Note - PDF Processing

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

Block 3 - Note - AI Analysis

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

Block 4 - Note - Logging

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

Block 5 - Upload Contract Form

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

Block 6 - Extract PDF Text

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

Block 7 - Analyze Contract

Type / Role: @n8n/n8n-nodes-langchain.chainLlm - chainLlm
Config choices: Version 1.4

Block 8 - Gemini Chat Model

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

Block 9 - Parse Risk Results

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

Block 10 - Log Review to Sheets

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 11 - Check Risk Level

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

Block 12 - Send Risk Alert

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

3. Summary Table

Workflow	Review PDF contract risks with a form, Google Gemini, Sheets, and Slack
Complexity	intermediate
Nodes	12
Categories	Document Extraction, AI Summarization
Author	Oka Hironobu
Published	24 Feb 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/13671/13671.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 AI Summarization workflows

Frequently asked questions

What does Review PDF contract risks with a form, Google Gemini, Sheets, and Slack 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, AI Summarization use case.

Oka Hironobu

30 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.formtrigger n8n-nodes-base.code @n8n/n8n-nodes-langchain.chainllm @n8n/n8n-nodes-langchain.lmchatgooglegemini n8n-nodes-base.googlesheets n8n-nodes-base.if n8n-nodes-base.slack

Complexity

intermediate

Published 24 Feb 2026

Likes 0

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Install path: /data/workflows/13671/13671.json

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Review PDF contract risks with a form, Google Gemini, Sheets, and Slack

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Who is this for

What this workflow does

How to set up

Requirements

How to customize

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Overview

Block 2 - Note - PDF Processing

Block 3 - Note - AI Analysis

Block 4 - Note - Logging

Block 5 - Upload Contract Form

Block 6 - Extract PDF Text

Block 7 - Analyze Contract

Block 8 - Gemini Chat Model

Block 9 - Parse Risk Results

Block 10 - Log Review to Sheets

Block 11 - Check Risk Level

Block 12 - Send Risk Alert

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