How do I convert a PDF to Word, Excel or JPG, and back, for free?
Most directions are built into tools you already have. PDF to Word: open the PDF in Microsoft Word (File > Open) and it becomes an editable document, or in Google Drive right-click the PDF and choose Open with Google Docs, which also reads text from scans (files of 2 MB or less; tables and columns are not likely to survive). Word to PDF: Save As PDF in Word, where Minimum size keeps the file small and a password option encrypts it. PDF to JPG and JPG to PDF: on a Mac, open the file in Preview, choose File > Export and pick the format. PDF to Excel is the hard one: Adobe's free online converters and iLovePDF handle tables best, and both process the file on their servers (Adobe deletes it unless you sign in; iLovePDF within two hours). Rule: Word, Google Docs or Preview for anything confidential, an online converter only for a document you would be happy to email to a stranger.
Microsoft's steps for saving Word, Excel and PowerPoint as PDF, the Minimum size option, encrypting with a password, and opening a PDF in Word to edit it.
Google's steps for Open with Google Docs, the 2 MB file limit, and what formatting survives; the language list includes Hindi, Bengali, Tamil, Telugu and most Indian languages.