With Adobe Acrobat Reader and Adobe’s online PDF editor, you can add comments, fill out forms, insert text, and even sign documents – all for free.

Need to edit a PDF document but don’t want to pay for the more expensive Adobe editors? You can add text to and sign a PDF with just the free Reader program.

Acrobat DC is a full, Windows-only PDF editor and reader that requires a Creative Cloud subscription. But you gain the ability to read, comment, scan, sign, and convert PDFs to Word, Excel, and ...

If you don’t already have Acrobat Reader, download it here. Launch Reader and then open the PDF you need to sign, or just double-click the file to open it directly in Reader.