This is a list of links to articles on software used to manage Portable Document Format (PDF) documents. The distinction between the various functions is not entirely clear-cut; for example, some viewers allow adding of annotations, signatures, etc. Some software allows redaction, removing content irreversibly for security. Extracting embedded text is a common feature, but other applications perform optical character recognition (OCR) to convert imaged text to machine-readable form, sometimes by using an external OCR module.

These are used by software developers to add and create PDF features.

These create files in their native formats, but then allow users to export them to PDF formats.

These allow users to view (not edit or modify) any existing PDF file.