GroupDocs.Viewer for Python via .NET Overview Leave feedback

GroupDocs.Viewer for Python via .NET is a native Python library that renders 170+ file formats — DOCX, PDF, XLSX, PPTX, CAD drawings, email messages, compressed archives, eBooks, and raster images — into HTML, PDF, PNG, or JPG output. It runs entirely on-premise, requires no Microsoft Office installation, and ships as a pre-built wheel on Windows, Linux, and macOS.

Typical uses include:

• In-app document preview — embed HTML rendering into desktop or web applications so users can read any document format without leaving the app.
• Server-side rendering pipelines — convert user uploads to PDF for archival or to per-page PNG for thumbnail generation.
• AI / RAG preprocessing — render DOCX, XLSX, EML, and scanned PDFs into page-level PNG images or structured HTML that LLMs can consume. See Agents and LLM Integration.
• Redaction and watermarking — apply text watermarks during rendering, or produce password-protected PDFs from unprotected sources.
• Accessibility and search — generate semantic HTML from PDFs, DWGs, and legacy office formats for indexing and screen readers.

from groupdocs.viewer import Viewer
from groupdocs.viewer.options import HtmlViewOptions

def quick_example():
    """Render a DOCX document to HTML — the hello-world example."""
    with Viewer("./sample.docx") as viewer:
        options = HtmlViewOptions.for_embedded_resources("page_{0}.html")
        viewer.view(options)

if __name__ == "__main__":
    quick_example()

from groupdocs.viewer import Viewer
from groupdocs.viewer.options import LoadOptions, PdfViewOptions, Watermark

def render_with_options():
    """Open a password-protected DOCX, render to PDF with a watermark."""
    load_options = LoadOptions()
    load_options.password = "secret"

    with Viewer("./protected.docx", load_options) as viewer:
        options = PdfViewOptions("./protected.pdf")
        options.watermark = Watermark("CONFIDENTIAL")
        viewer.view(options)

if __name__ == "__main__":
    render_with_options()

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page_2.html (149 KB)
page_3.html (113 KB)

1. Install the package — Installation walks through PyPI and offline wheel installation for Windows, Linux, and macOS.
2. Run your first rendering — Quick Start Guide renders a DOCX to HTML, PDF, and PNG in five minutes.
3. Explore the examples — Running Examples clones the runnable repository and runs every documented scenario locally or in Docker.
4. Use it in depth — the Developer Guide covers loading, rendering, inspecting, page selection, watermarks, and attachments.
5. Render per format — the Rendering Basics section has per-format guides for PDF, Word, Excel, presentations, CAD, email, and more.
6. Plug it into AI pipelines — Agents and LLM Integration explains the MCP server, AGENTS.md, and how to chain GroupDocs.Viewer with GroupDocs.Conversion for exotic inputs.