I am not building an API but an online application where the user can drag and drop a PDF into the web page and it generates a PDF. What kind of license would I need to be allowed to do this?
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You need to purchase the server license, after you purchased server license, you can call it from your server to convert documents.
VeryPDF
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Could you provide me with a link to the product info?
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Thanks for your message, do you wish convert office and html files to PDF files from your website application? If yes, you can download docPrint Pro v5.0 from following web page to try,
https://www.verypdf.com/artprint/index.html#dl
please refer to following web page for more information about "How to call docPrint SDK from VB, C#, ASP, PHP etc. program languages?",
https://www.verypdf.com/artprint/docprintsdk.htm
you can look at more Archives about docPrint Pro at following web page,
https://www.verypdf.com/wordpress/category/docprint-pro
VeryPDF