PDF Link automates text linking by supporting various link types (http, https, ftp, mailto, and file) for creating, changing, removing and reporting external web links.

PDF Link is equipped with a multitude of standout features, including the ability to remove all links, create links based on text, add new text links, change links from text and current links, change parts of a link, and report link information. Additionally, it allows users to add text in different styles, colors, link styles, font sizes, types, and filename stamping with a link.
This software is ideal for users who need to modify multiple PDF documents with many links quickly. It offers straightforward command-line parameters, such as pdflink test.pdf out-add-link.pdf -text "link text here" -link "" -pos10,10 -size20 (which adds a link, bottom left), pdflink out-add-link.pdf out-add-change.pdf -change -textlink "adobe systems" -newlink "" (changing any current links with text 'adobe systems' to a new link), pdflink out-add-link.pdf out-add-change-part.pdf -changepart -link ".adobe.com" -newlink ".adobesys.com" (changing any current links with a link that contains part 'adobe.com' to the new link part), and pdflink list.txt -fout -s1 -e2 -remove list.txt file containing: in1.pdf in2.pdf in3.pdf (which removes all links in those pdf's).
To get a complete list of parameters, check out the full list of features. However, the evaluation restrictions include a *TRIAL* text added to links and new links, while the -remove, -create, and -report options are limited to the first ten pages only.
Overall, PDF Link is a helpful software tool for optimizing PDF documents that require link addition, modification, and removal.
Version 1.10: see what's new in help