Bug report

Reproduction of the problem

1. Open the Demos - https://demos.telerik.com/aspnet-core/pdfviewer/dpl-processing
2. Load the file Test_pdf_png.pdf

Current behavior

An error: Unable to load image 'data:image/png;base64 is thrown in the console

Expected/desired behavior

Loaind images when using DPL is a limitation, but there should be no errors in the browser console even when a file containing image is loaded in the PDFViewer.

Environment

• Kendo/Telerik version: 2026.2.520
• Browser: [all ]

Bug Report

When applying the kendo.aspnetmvc.ready.min approach in the following Knowledge Base articles for PDFjs workarounds(MVC/Core), the watermark and banner display.

Reproducible

1. See attached project: PDFViewerKendoReady.zip
2. Run the project.

Current Behavior

The watermark and banner appear.

Expected Behavior

The watermark and banner should not appear.

Environment

Kendo UI version: 2026.2.520
jQuery version: 4.0.0
Browser: all

Bug Report

When applying the partial view approach in the following Knowledge Base articles(MVC/Core), the watermark and banner display.

Reproducible

1. See attached project: PDFViewerPartialView.zip
2. Run Project

Current Behavior

The watermark and banner appear

Expected Behavior

The watermark and banner should not appear.

Environment

Kendo UI version: 2026.2.520
jQuery version: 4.0.0
Browser: all

Currently, if a PDFViewer is opened on a mobile device and we use two fingers to zoom its content, the file is zoomed but the more we zoom it, the blurrier its content becomes. The reason for this is the fact that when we use "pinch-zoom" to zoom the PDF file(in a PDFViewer) it is zoomed using the browser's zoom functionality and not the functionality provided by the PDFViewer component. 

It will be a very useful feature if the built-in PDFViewer zoom functionality is used when the user zooms content with two fingers, on a mobile device

Is it possible to add an option similar to the Data() method that can be used to pass additional parameters to the remote endpoint through the Read request of the PDFViewer?

For example:

    @(Html.Kendo().PDFViewer().Name("pdfviewer")
        .DplProcessing(dpl => {
            dpl.Read(r => r.Url(Url.Action("GetInitialPdf", "PdfViewer")).Data("additionalParams"));
            ...
        })
    )

<script>
function additionalParams() {
  return {
    param1: "test"
  }
}
</script>

Provide editable AcroForms support in PDFViewer.

The current implementation of the Kendo PDFViewer depends on pdf.js, so the following should be taken into account:

https://github.com/mozilla/pdf.js/issues/7613