PDFx - Extract references and metadata from PDF documents

Reading over many scientific papers and its references recently, I thought it would be great to be able to download all the references at once… This inspired me to write a little tool to do just that, and now it’s done and released under the Apache open source license:

https://github.com/metachris/pdfx

Features

• Extract references and metadata from a given PDF
• Detects pdf, url, arxiv and doi references
• Fast, parallel download of all referenced PDFs
• Find broken hyperlinks (using the -c flag)
• Output as text or JSON (using the -j flag)
• Extract the PDF text (using the --text flag)
• Use as command-line tool or Python package
• Compatible with Python 2 and 3
• Works with local and online pdfs

source