Converting PDF documents into HTML is essential for content sharing, archiving, and publishing online. HTML offers flexible formatting and responsiveness that static PDFs cannot. This article demonstrates how to convert PDF to HTML in C# .NET online, a robust tool for document transformation.
PDF to HTML REST API
The Aspose.PDF Cloud SDK for .NET allows developers to transform PDFs into clean, responsive HTML pages. Key features include:
Key Features:
- Preserves Layout: Maintains fonts, images, tables, and structure.
- Responsive HTML Output: Optimized for web and mobile browsers.
- Output Customization: Choose to split HTML per page or generate a single file.
- Cloud-Based: Easily accessible across platforms with no local dependencies.
Prerequisites:
To begin:
Install the official SDK from NuGet:
Install-Package Aspose.PDF-Cloud
Register at Aspose Cloud Dashboard to get your Client ID and Client Secret.
Convert PDF to HTML in C#
Below is a simple example showing how to use the .NET SDK to convert a PDF document into HTML:
- Firstly, create an instance of
Configuration
where we pass client credentials.- Secondly, initialize an object of
PdfApi
while passing Configuration object.- Thirdly, create an object of
PutPdfInRequestToHtml
where we define resultant HTML file.

Image:- A preview of PDF to HTML conversion.
Export PDF to HTML using cURL
For command-line enthusiasts, here’s how you can use cURL to convert PDF to HTML via REST API.
Step 1. Get Access Token:
curl -v "https://api.aspose.cloud/connect/token" \
-X POST \
-d "grant_type=client_credentials&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET" \
-H "Content-Type: application/x-www-form-urlencoded" \
-H "Accept: application/json"
Step 2. Convert PDF to HTML:
curl -v "https://api.aspose.cloud/v3.0/pdf/{inputPDF}/convert/html?compressSvgGraphicsIfAny=false&documentType=Html5&fixedLayout=true&splitIntoPages=false&rasterImagesSavingMode=AsPngImagesEmbeddedIntoSvg&removeEmptyAreasOnTopAndBottom=true&flowLayoutParagraphFullWidth=true" \
-X GET \
-H "accept: multipart/form-data" \
-H "authorization: Bearer {ACCESS_TOKEN}" \
-o "Converted.zip"
Replace {ACCESS_TOKEN}
and inputPDF
with your actual token and PDF file available in cloud storage.
Try Online PDF to HTML Converter
Want to test the feature without writing code? Try our online PDF to HTML converter, built on the same API.

Free PDF to HTML Converter App.
Conclusion
With .NET REST API, developers can quickly transform static PDFs into responsive HTML content. This helps streamline document publishing workflows for websites, CMS platforms, and online archives.
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