Which would be best web based PDF editor using dot net core and javascript

I am working with a requirement for one of module in project(.Net Core) which comprises of multiple pdf operations, like converting from pdf to html, then editing the html in a web view editor, finally converting it into a pdf.

I had worked out with some of pdf editors available which are as follows:

1. Spire pdf
   
   Observation:
   
   I used existing code samples provided for spire pdf to convert from pdf to html and vice-versa. What i find missing in this editing the html editor in a web view, which allow me to add text, signature etc in the editor.
   
2. Sejda Online PDf editor tool (Javascript)
   
   Observation:
   
   Developers link: Sejda.com/developers Online tool seems pretty cool but not able to integrate the editor in web view as trying to create token but website says a user can be only registered with official email ids.
   Pricing for this library is also a factor.
   
   

Please find screenshot below :

3. PDF Tron(Javascript)
   
   Observation:
   
   I used javascript code provided to use web based pdf editor. I am able to perform required editing operationswith sample file provided like adding text, adding signature, highlighting text. But when i am trying to use a local based pdf on my machine its stuck with some cors issue. Pricing for this library is also a factor. Below mention code:
   const viewerElement = document.getElementById('viewer');
WebViewer({
path: 'https://pdftron.s3.amazonaws.com/webviewer/5.1.0/lib',
initialDoc: 'https://pdftron.s3.amazonaws.com/downloads/pl/demo-annotated.pdf',// replace with your own PDF file }, viewerElement).then((instance) => { // call apis here });

Thank you for going through the article, feel free for any more suggestions, i would be happy to try out some more ways to achieve my requirement.