# Process scanned invoices with Google Drive and OCR: 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/process-scanned-invoices-with-google-drive-and-ocr (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)

# Process scanned invoices with Google Drive and OCR

Started by an event in a connected app, and works across Google Drive and Google Sheets. It hands the judgement calls to OpenAI. 19 steps, 2 branches, 1 loop or waits: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fprocess-scanned-invoices-with-google-drive-and-ocr)

**19 steps** Medium: a working afternoon

**2** Branches: places the flow splits

**1** Loop or waits

**2** Services it connects to

## The flow

Starts it 2 Model 2 Logic 7 Service 8

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

- 1 **When clicking 'Execute workflow'** Manual trigger *Starts it*
- 2 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 3 **Check for new invoices** Google Drive trigger *Starts it*
- 4 **Fetch 50 docs** Google Drive *Service*
- 5 **Information Extractor** Information Extractor *Model*
- 6 **Download file** Google Drive *Service*
- 7 **Append row in sheet** Google Sheets *Service*
- 8 **Loop Over Items** Split In Batches *Logic*
- 9 **Prepare a table** Html *Logic*
- 10 **Set file identity** Set *Logic*
- 11 **Mailgun** Mailgun *Service*
- 12 **Save base64** Extract From File *Service*
- 13 **Switch Mime Type** Switch *Logic*
- 14 **Analyze Image** Http Request *Service*
- 15 **Extract from File** Extract From File *Service*
- 16 **Edit Fields** Set *Logic*
- 17 **Identify CamScanner** If *Logic*
- 18 **Re-set base64** Set *Logic*
- 19 **Convert to File** Convert To File *Service*

## How it's built

- **Starts on:** An event in a connected app
- **Steps:** 19, with 2 branches, 1 loop or waits
- **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. 19 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 19 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%2Fprocess-scanned-invoices-with-google-drive-and-ocr)
- **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.

- [**Analyze invoices from Google Drive with Gemini and OpenAI** 19 steps · calls a model · Google Drive, Google Sheets](https://millionrounds.com/workflow/analyze-invoices-from-google-drive-with-gemini-and-openai)
- [**Automate personalized Upwork proposals with OpenAI** 19 steps · calls a model · Google Docs, Google Drive](https://millionrounds.com/workflow/automate-personalized-upwork-proposals-with-openai)
- [**Score Upwork jobs and generate proposals with Apify and OpenAI** 19 steps · calls a model · Google Sheets, Telegram](https://millionrounds.com/workflow/score-upwork-jobs-and-generate-proposals-with-apify-and-open)
- [**AAAS: AI Accounts Assistant for Invoices, GST & Reminders** 19 steps · Google Drive, Google Sheets](https://millionrounds.com/workflow/aaas-ai-accounts-assistant-for-invoices-gst-and-reminders)
- [**Automate payment gateway & database transaction reconciliation** 19 steps · Email, Google Sheets](https://millionrounds.com/workflow/automate-payment-gateway-and-database-transaction-reconcilia)
- [**Automated event management with Typeform and Stripe** 19 steps · Gmail, Google Calendar](https://millionrounds.com/workflow/automated-event-management-with-typeform-and-stripe)