OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDF documents, as well as generating PDFs from HTML. It is licensed under the LGPL and MPL open source licenses.

If you're considering PuppeteerSharp for PDF generation, here's the version of the story that doesn't show up in the "getting started" docs.

PDF Editify makes browser-based markups and utility tasks easy, but it remains limited as a full document editor.

You don’t need expensive software for basic PDF tasks. In fact, all you need is a handful of free web-based apps.

Iron Software builds trusted .NET libraries for document automation. The PDF specification is a 1,000-page ISO standard, and generating compliant documents from C# code is harder than most developers ...