Automated Invoice Extraction: Gmail PDFs to Sheets via LlamaParse & Gemini
Automates extraction of structured data like PO numbers, line items, taxes, and totals from PDF invoice attachments in Gmail using LlamaParse and Gemini, then stores in Google Sheets.
This n8n workflow automates the processing of invoice PDFs received via Gmail. It triggers on new emails with attachments, filters for unprocessed ones, uploads PDFs to LlamaParse for Markdown conversion, polls for completion, downloads the parsed content, uses Gemini 2.5 LLM to extract structured JSON data (e.g., PO numbers, line items, taxes, totals), appends to Google Sheets, and labels the email to prevent reprocessing.
Benefits include significant time savings for finance teams by eliminating manual data entry, reducing errors in bookkeeping, and enabling seamless monthly reconciliations. It's scalable for high-volume invoice handling and integrates powerful AI parsing without custom coding.
Ideal use cases: vendor invoice management, automated AP workflows, expense tracking for small businesses, or integrating with accounting software via Sheets exports. Note potential API costs for LlamaParse/Gemini and regional Gemini availability.
New buyers can create an account from the cart to unlock a controlled $10 first-purchase credit on eligible orders of $25+.
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How to import this workflow into n8n
- 1Purchase or download the workflow to get the n8n workflow JSON file.
- 2In your n8n instance, open Workflows and choose "Import from File" (or paste the JSON with Ctrl+V on the canvas).
- 3Open each node marked with a credential warning and connect your own accounts and API keys.
- 4Run the workflow once manually to verify the data flow, then toggle it to Active.
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