OCR Terminal: Online OCR
OCR Terminal: Online OCR will let you Convert PDF to Word, JPEG to Word.
This will allow you to convert up to 20 pages a month for free (more if you pay).
A PDF file may not be usable in a Word (or other word processor) document. A picture of text scanned in is definitely nothing more than a pattern of pixels to a computer. These need to be converted to text by an OCR (optical character recognition) program, which basically guesses which groups of pixels look like letters.
Be aware that ANY such program is only making best guesses, and may make mistakes. You need to proofread the results and compare to the original to find them.