Document Tagger SharePoint Add-in tags documents in SharePoint document libraries with keywords, which helps organizations to take full advantage of their site's metadata driven SharePoint Search.
All tags are added in an Enterprise Keywords column. The keywords are centrally stored in the Term Store and used in the SharePoint Search. The Enterprise Keywords are also available as suggestions for the whole farm or tenant.
But better search is just one advantage. You can also filter by tag and create SharePoint views for certain tags.
Document Tagger sends your document to a language processing engine, Google Cloud Natural Language, which quickly analyzes it and sends back the top 15 suitable keywords. Review the suggestions, remove those that are not relevant and add more keywords if needed. Then click on the ‘Apply tags’ button, to apply the tagging.
This way the addition of SharePoint metadata is much quicker than adding each word manually.
Document Tagger supports DOCX, PDF, PPTX, TXT and XLSX files.
This version will work for 30 days. Then you have to register Document Tagger to continue using it. Please refer https://www.kalmstrom.com/products/Document-Tagger/Subscribe.htm