I recently learnt that one can download WOFF files from any website that uses them, and convert them into TTF files (using an online tool like CloudConvert) if we wanted to use them in say a MS Word or Powerpoint slide deck.
This allowed me to create a custom powerpoint theme / template that captures the essence of a particular brand.
Worth noting that web fonts are often split up across multiple files for sets of codepoints and font weights/styles, so depending on the language you're writing in a single WOFF file might be missing a few letters.
