How to convert text into narrow columns for faster reading

Hey folks,

I read faster when the text is arranged into narrow columns on the page (like a newspaper) rather than the standard wide column (like most books). But I like to read on my laptop and most PDFs have the standard width column.

Are there any apps around this? How can I quickly convert a document - a PDF, for example - that originally is laid out in just the one standard wide column into two narrow columns, without losing any of the text?

I tried two websites, but no dice: they seem to either lose text or simply slice the page in half, without rearranging the text (https://deftpdf.com/split-pdf-down-the-middle
*and*https://online2pdf.com/en/cut-pdf-pages-into-halves)

Thanks!