Polar allows you to bulk import one or more PDFs from a directory on you local disk and imports them into your repository.
If you have cloud sync enabled they’re automatically imported into the cloud.
Multiple files can be imported by selecting more than one.
We attempt to extract metadata from the PDF - specifically the document title.
If no metadata is available we revert to the filename as the title (including extension).
We do not currently (2018-01-25) support recursively adding directories.
We do not currently (2018-01-25) support DOI metadata extraction for PDFs.
This is something we’re actively investigating including DOI/arxiv metadata resolution using public APIs.