Export Invoice Data to CSV on Mac — No Spreadsheet Typing

The spreadsheet typing trap

Every accountant, bookkeeper, and freelancer knows the ritual: it's the end of the month, you have 30 invoices to process, and you need a spreadsheet with vendor names, dates, amounts, and tax. So you open each PDF. Find the total. Tab to your spreadsheet. Type it. Close the PDF. Open the next one.

At 90 seconds per invoice, 30 invoices takes 45 minutes. And that's if you don't mistype anything. One transposed digit in a tax amount and your numbers don't add up, and now you're re-reading PDFs trying to find the error.

This is pure overhead — work that produces no insight, just transcribed data. The information was already in the PDF. You're just copying it by hand.

What a good CSV export looks like

A useful invoice CSV has at minimum:

That's what PileSort produces — one row per invoice, all the fields extracted automatically, ready to import into your accounting software or send to your accountant.

How PileSort extracts invoice data

PileSort uses GPT-4o Vision — OpenAI's most capable document understanding model — to read each invoice. Unlike older OCR tools that scan text character by character, GPT-4o understands the structure of a document: it knows that "Total Due" and "Amount Payable" both refer to the same thing, and that "31/10/2024" is a date in European format.

Fields extracted for every invoice:

• Supplier name — the company issuing the invoice
• Invoice date — normalized to YYYY-MM-DD
• Invoice number
• Subtotal (pre-tax amount)
• Tax amount (VAT, GST, sales tax — whatever's on the invoice)
• Total amount
• Currency

This works on PDFs (even scanned ones), JPEGs, and PNGs. It handles invoices in multiple languages — English, Spanish, French, German — because GPT-4o understands all of them.

How to export invoice data to CSV on Mac

What to do with the CSV

Most people use PileSort's CSV for one of:

• Sending to your accountant — along with the renamed PDF files, they have everything they need
• Importing into accounting software — most tools accept CSV for expenses/purchases
• VAT reconciliation — sum the tax column and cross-reference with your bank statement
• Monthly expense tracking — paste into a master expenses sheet

Is it accurate?

GPT-4o Vision is highly accurate on clean digital invoices — accuracy in testing runs over 95% for supplier name, date, and total. For scanned paper invoices the accuracy drops slightly depending on scan quality. PileSort shows you all extracted data before export so you can spot any errors and fix them.

The bottom line: even at 95% accuracy, having 28 of 30 invoices correct and fixing 2 manually is far faster than typing all 30 by hand.