: PDF Annotator 9 is an old version. The official developer, GRAHL software design , states that version 9 is no longer supported and receives no security updates.
: An open-source application specifically designed for handwritten notes and PDF annotation.
: A completely free tool for Windows and Mac that supports highlighting, signatures, and form filling without watermarks.
: A free, open-source universal document viewer that supports advanced annotation features.
: Provides standard markup tools like notes, highlights, and freehand drawing for free.
If you need PDF annotation tools without paying for a full license, there are several reputable free alternatives:
