# Help me to build a invoice extractor

**URL:** <https://community.n8n.io/t/help-me-to-build-a-invoice-extractor/214223>\
**Category:** Help me Build my Workflow\
**Created:** [October 30, 2025, 7:20pm UTC](https://community.n8n.io/t/help-me-to-build-a-invoice-extractor/214223 "2025-10-30T19:20:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![No\_Code\_Loom](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/no_code_loom/32/118776_2.png) [@No\_Code\_Loom](https://community.n8n.io/u/No_Code_Loom)\
**Post date:** [October 30, 2025, 7:20pm UTC](https://community.n8n.io/t/help-me-to-build-a-invoice-extractor/214223/1 "2025-10-30T19:20:03Z")

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Hello everybody,

I wanted to create a invoice processing tool through n8n. My process will be

1. Upload invoice from google drive
2. File Conversion from Excel
3. Invoice process as my desired data like Purchase Order, Price, product name, model, Manufacturer etc.
4. Output the information in google sheet.

But I am not allowed to use any LLM model.

How could I build this properly?

TIA.

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**Author:** ![Parintele\_Damaskin](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/parintele_damaskin/32/139243_2.png) [@Parintele\_Damaskin](https://community.n8n.io/u/Parintele_Damaskin)\
**Post date:** [October 30, 2025, 9:34pm UTC](https://community.n8n.io/t/help-me-to-build-a-invoice-extractor/214223/2 "2025-10-30T21:34:15Z")

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Google Drive node: Download the invoice file.

Extract from file node: Read and parse the Excel file.

Set/Function node: Map and process the required fields.

Google Sheets node: Append the processed data to your sheet.

This I think will go with CSV or excel… but for advanced parsing like PDF, nothing on my mind yet…

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**Author:** ![roadfew](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/roadfew/32/58676_2.png) [@roadfew](https://community.n8n.io/u/roadfew)\
**Post date:** [October 31, 2025, 3:20am UTC](https://community.n8n.io/t/help-me-to-build-a-invoice-extractor/214223/3 "2025-10-31T03:20:22Z")

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Adding to what Parintele\_Damaskin said, for PDF parsing and stuff, you can try CustomJS PDF generator node

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**Author:** ![Hamza\_BF](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/hamza_bf/32/52272_2.png) [@Hamza\_BF](https://community.n8n.io/u/Hamza_BF)\
**Post date:** [June 14, 2026, 4:08am UTC](https://community.n8n.io/t/help-me-to-build-a-invoice-extractor/214223/4 "2026-06-14T04:08:30Z")

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A practical n8n path is: download PDF → extract/OCR → normalize line items → append to CSV or Sheets. The key is to split header fields from table rows and keep a manual review branch for low-confidence files, because invoice tables are where automations usually break.