curiously poppler doesn't mention that anywhere on their website, but the library comes with a similar suite of tools, typically available in linux distributions.
i have found them very helpful.
https://en.wikipedia.org/wiki/Poppler_(software)#poppler-uti...
I use these all the time. They are great.
Same, in conjunction with some of the format conversion tools that come with Ghostscript, and PDFgrep (https://pdfgrep.org/).