# Generate Google Drive invoice PDFs from plain text with OpenAI: n8n workflow

> Started by an event in a connected app, and works across Google Drive and Google Sheets. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/generate-google-drive-invoice-pdfs-from-plain-text-with-open (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Money admin](https://millionrounds.com/workflows?category=Money+admin#library)

# Generate Google Drive invoice PDFs from plain text with OpenAI

Started by an event in a connected app, and works across Google Drive and Google Sheets. It hands the judgement calls to OpenAI. 12 steps: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgenerate-google-drive-invoice-pdfs-from-plain-text-with-open)

**12 steps** Medium: a working afternoon

**0** Branches: places the flow splits

**0** Loops or waits

**2** Services it connects to

## The flow

Starts it 1 Model 4 Logic 3 Service 4

The steps in the order they run, from what starts it.

- 1 **Start with invoice details** Execute Workflow trigger *Starts it*
- 2 **Chat model** Lm Chat Open Ai *Model*
- 3 **Chat model - Parser auto-fix** Lm Chat Open Ai *Model*
- 4 **Read the invoice details** Agent *Model*
- 5 **Output Parser - Invoice fields** Output Parser Structured *Model*
- 6 **Build the invoice fields** Set *Logic*
- 7 **Build the invoice HTML** Code *Logic*
- 8 **Convert HTML to PDF** Http Request *Service*
- 9 **Upload the PDF to Drive** Google Drive *Service*
- 10 **Clear the input tab** Google Sheets *Service*
- 11 **Clear the output tab** Google Sheets *Service*
- 12 **Return the file link** Set *Logic*

## How it's built

- **Starts on:** An event in a connected app
- **Steps:** 12
- **Size:** Medium: a working afternoon
- **Connects to:** Google Drive, Google Sheets
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Google Drive and Google Sheets accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an event in a connected app.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 12 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 12 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgenerate-google-drive-invoice-pdfs-from-plain-text-with-open)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Google Drive](https://millionrounds.com/workflows?service=Google+Drive#library)[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)

## Workflows like it

Also money admin, with the same services where possible, closest in size first.

- [**AI auto-save Gmail receipts to Google Sheets + Google Drive** 12 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/ai-auto-save-gmail-receipts-to-google-sheets-google-drive)
- [**AI business proposal generator with Gemini and Google Drive** 12 steps · calls a model · Google Drive, Google Sheets](https://millionrounds.com/workflow/ai-business-proposal-generator-with-gemini-and-google-drive)
- [**Automate employee trip expense processing with Jotform** 12 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/automate-employee-trip-expense-processing-with-jotform)
- [**Automate invoice processing & stock management with Gmail** 12 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/automate-invoice-processing-and-stock-management-with-gmail)
- [**Automated Invoice Flow Manager with OpenAI and Gmail** 12 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/automated-invoice-flow-manager-with-openai-and-gmail)
- [**Automated trip expense claim form with OpenAI and Google Drive** 12 steps · calls a model · Email, Google Drive](https://millionrounds.com/workflow/automated-trip-expense-claim-form-with-openai-and-google-dri)