How do I extract data from a PDF without typing it in?

Every route out of a PDF is doing the same thing: recovering structure that the format never stored explicitly. They differ in how much structure they recover and how much repair they leave to you.

Copy and paste recovers characters and nothing else. A spreadsheet import recovers a grid, provided the grid is simple and every row is one line tall. A generic converter guesses at the table and hands you something that looks close, which is the dangerous state because errors are not obvious.

A document specific extractor starts from knowledge of the document type. It knows a bank statement has a date column, a description column and either signed amounts or separate debit and credit columns. That knowledge is what lets it join wrapped rows correctly, discard summary blocks and, crucially, check its own output against the totals the document itself prints.

That last capability is the difference between an extraction you can act on and one you have to proofread. Verification is not a nicety; it is what tells you a page was missed.

Pulling three figures off an invoice: copy and paste is fine, and anything more elaborate is a waste of time.

A one page grid of product codes and prices with one line per row: a spreadsheet import handles it.

Forty pages of bank statement with wrapped descriptions and a running balance: a generic converter will produce forty pages of near misses, and finding the three wrong ones by hand costs more than the conversion saved.

The same supplier statement arriving every month: worth setting up once as a repeatable process rather than fifty individual conversions.

Retyping is slow and it is the single largest source of numerical error in manual bookkeeping. Removing it removes both the hours and the mistakes.

Structured data also unlocks everything downstream: sorting, categorising, comparing periods, and importing into accounting software without a second round of manual entry.

Trusting output that was never verified against a printed total.

Running OCR on a PDF that already had a text layer, which converts exact characters into approximations.

Only checking the first page of a long document.

Letting local date and number defaults overwrite the document's own conventions, which turns the fifth of March into the third of May.

Repeating a manual conversion monthly instead of automating a document that arrives on a schedule.