Short answer: drop the PDF and the text appears in the box, page by page, ready to copy or download as .txt. If a page is a scan with no text layer, the page number is named — nothing is invented to fill the gap.
Text layer versus pixels
A PDF made from a word processor stores characters; a PDF made by a scanner stores a picture of them. Only the first kind has text to extract. That is why a “PDF to text” result can be perfect on one file and empty on the next — the difference is in the file, not in the tool.
Where the layout goes
Extraction keeps words and page breaks, and loses columns, tables and font sizes. For a contract that is fine; for a financial statement you want the table structure, which is what PDF to JPG plus a spreadsheet gives you instead. Choose the tool by what the next step needs.