Create fillable document templates from PDF or DOCX with GPT-4o and Google Drive

📄Template Creator

How it works

This workflow accepts any uploaded document (PDF or DOCX) via webhook and automatically converts it into a reusable fill-in-the-blank template.

Step 1 — Identify: GPT-4o first reads the document and determines the document type (e.g., Employment Contract, Invoice, NDA, Lease Agreement, Project Proposal) and the specific variable fields that type of document typically contains.

Step 2 — Templatize: A second AI pass uses the identified document type and field list to replace all variable content with clearly labeled [BRACKET] placeholders while preserving all static boilerplate and structure verbatim.

Step 3 — Deliver: The cleaned template is rendered to PDF via Gotenberg, uploaded to Google Drive, made publicly accessible, and a JSON response with file URLs is returned to the caller.

Setup

1. Configure the Webhook path if needed (default: general-template-creator)
2. Set your OpenAI credential on both LLM nodes
3. Set your Google Drive credential and confirm the target folder ID in the Upload node
4. Confirm the Gotenberg URL matches your self-hosted instance
5. Install the community node n8n-nodes-word2text (see ⚠️ warning sticky)

Customization

• Swap GPT-4o for GPT-4.1 or GPT-4.1-mini on the Identify node to reduce cost on the lighter classification task
• Add a Switch node after identification to route different document types to type-specific prompts
• Modify the Drive folder ID to sort templates into subfolders by document type

Document accepts input from a form such as the one found here:
Sample Form