HiQPdf Software 18.0 Changes Log

In this release, we introduce HiQPdf Next for .NET, a new generation of components designed for modern .NET applications. The library enables you to create, edit and merge PDF documents, convert HTML to PDF or images, convert Word, Excel, RTF and Markdown to PDF, extract text and images from PDF files, search text within PDF documents and convert PDF pages to images.

To get started, visit the product page: HiQPdf Next for .NET. From there, you can access:


The HiQPdf Next for .NET library was designed to coexist with the HiQPdf Classic for .NET libraries, which have demonstrated efficiency, reliability and stability over many years of real-world usage. The Classic tools will continue to be maintained and supported for future .NET versions.

Licensing and Upgrade Information

The same HiQPdf license works with both the Classic and Next product lines. This means you can adopt HiQPdf Next in new projects while continuing to use Classic in existing applications.

Customers with an active maintenance subscription are entitled to upgrade to version 18.0 at no additional cost. If your maintenance has expired, please visit the License Renewal page for renewal options.

HiQPdf Next for .NET v18.0

Many features overlap between the Classic and Next components. However, the Next suite was specifically designed for improved portability and extensibility. While the APIs are similar, there are architectural differences due to the distinct underlying technologies used by each suite.

Target Frameworks and Deployment

The HiQPdf Next library targets .NET Standard 2.0 and can be used in applications targeting:

  • .NET 10, 9, 8, 7 and 6
  • .NET Framework 4.6.2 and later

It supports deployment on:

  • Windows and Linux platforms
  • Azure App Service and Azure Functions
  • Docker containers


Modular Architecture

The library features a modular structure, with separate NuGet packages for each major component. This prevents unnecessary assemblies from being included in your applications. All components share the HiQPdf.Next namespace and can be used together within the same project.

Below is a summary of the main features:

  • Create, edit and merge PDF documents
  • Apply HTML stamps, headers and footers to PDF documents
  • Generate password-protected and digitally signed PDF files
  • Convert HTML (with CSS, web fonts and JavaScript) to PDF
  • Convert HTML to JPEG, PNG and WebP images
  • Convert SVG to PDF
  • Convert Word (DOCX) to PDF
  • Convert Excel (XLSX) to PDF
  • Convert RTF to PDF
  • Convert Markdown to PDF
  • Convert PDF to text
  • Search text within PDF documents
  • Convert PDF pages to images
  • Extract images from PDF pages


HiQPdf Classic for .NET v18.0

The Classic Tools suite, which includes HTML to PDF Converter, Word to PDF Converter, Excel to PDF Converter, PDF to Text Converter, PDF to Image Converter, PDF to HTML Converter, PDF Images Extractor, PDF Print, PDF Merge, PDF Split and PDF Security, Excel Library, has been updated to ensure compatibility with:

  • .NET 10
  • Visual Studio 2026
  • Windows Server 2025
HiQPdf Software 17.0 Changes Log
Refer to the relevant sections of the updated documentation and the live demo for a complete example of how to use the new features
  • A new Word to PDF Converter class has been added which allows you to convert Word DOCX to PDF, preserving the PDF page settings from the Word document or using custom PDF page settings to reflow the content
  • A new PdfDocument class has been added which provides the necessary API to programmatically create PDF documents by adding text and image elements
  • Deployment of HiQPdf Chromium for .NET to Linux machines, Azure App Service and Azure Functions for Linux has been greatly simplified
  • New capabilities for adding HTML content with page numbering in headers and footers. Header and footer visibility can now be configured independently on the first page, odd pages and even pages
  • Added support for HTML stamps with page numbering on PDFs generated from HTML
  • A new PdfEditor class has been added which provides the necessary API to add HTML stamps with page numbering to existing PDFs
  • New features for converting only the regions from the HTML page selected by a CSS selector
  • New features for excluding from conversion some regions of the HTML page selected by a CSS selector
  • New features to retrieve the position in the PDF for HTML elements selected by a CSS selector
  • A Dockerfile is now provided for deployment in both Windows and Linux containers. The documentation offers step-by-step examples for deploying the HiQPdf Chromium demo application and accessing it from outside the container
  • Full compatibility with .NET Core 9 has been ensured across all .NET Core libraries
  • Includes various bug fixes and overall improvements
HiQPdf Software 16.0 Changes Log
  • The new HiQPdf Chromium HTML to PDF Converter for .NET can convert the most sophisticated HTML pages to PDF without losing formatting on Windows and Linux platforms. The converter can also be used without restrictions in Azure App Service and Azure Functions environments, both on Windows and Linux. You can find below a short list of the most important features. You can see all the features on the HiQPdf Chromium for .NET page.
  • Support for Cutting-Edge HTML, CSS and JavaScript Features
  • Available on Both Windows and Linux Platforms
  • Built for .NET Standard 2.0 for Maximum Compatibility with .NET Core 9.0, 8.0, 7.0, 6.0, 5.0 and .NET Framework versions from 4.6.2 to 4.8.1
  • Fully Compatible with Azure App Service and Azure Functions on Both Windows and Linux
  • ASP.NET Core Demo Application with C# Code for All Features
  • Simple and Flexible Licensing with a Single License for All Libraries
  • The classic HiQPdf Library for .NET has been updated to:
  • Ensure compatibility with .NET Core 8
  • Address vulnerabilities introduced by certain Microsoft .NET Core dependency packages
  • Fix various bugs and introduce improvements
HiQPdf Software 15.0 Changes Log
  • Multi-Platform solution to make the library features available on new platforms like Linux and MacOS or Azure App Service for Windows and Linux. You can see all the features in Multi-Platform PDF Library for .NET Core page
  • New client library for .NET Core you can use in .NET Core applications on Windows, Linux and MacOS operating systems or in Azure App Service for Windows and Linux
  • The new client library for .NET Core can be used in in Universal Windows Platform applications or in Xamarin applications for Android and iOS
  • New client library for .NET Framework you can use in applications targeting .NET Framework 4
  • New HiQPdf Server, both regular and NG version, you can run as a Windows Service or as an Azure Cloud Service, with detailed installation instructions
  • Validated the compatibility with .NET Core 7
  • Bug fixes and improvements
HiQPdf Software 14.0 Changes Log
  • Support for .NET 6.0
  • New sample applications for .NET 6.0
  • New sample application for Azure Cloud Service
  • Updated demo applications for Visual Studio 2022
  • Bug fixes and improvements
HiQPdf Software 12.0 Changes Log
  • Support for .NET 5 and .NET Standard 2.0
  • New sample applications for .NET 5
  • Bug fixes and improvements
HiQPdf Software 11.0 Changes Log
  • A new library for .NET Core applications on Windows was released
  • New sample applications for MVC, .NET Core and Azure Cloud Service were included in the latest packages
  • Applied the latest security patches for a more secure access to HTML pages to be converted
  • Improved NuGet packages to support various package management formats in Visual Studio
  • Bug fixes and performance improvements
  • A new improved rendering engine was introduced in the NG version of the library
  • The new NG rendering supports newer HTML features and JavaScript standards like CSS Flexbox, ECMAScript 6
  • The new WOFF 2 standard for web fonts is now supported by NG version of the library
  • The new Internet standard HTTTP2 for faster access to secure HTTPS pages can be enabled in the NG version of the library
  • The new TLS 1.3 encryption protocol for secure HTTPS pages is now supported by NG version of the library
HiQPdf Software 10.0 Changes Log
  • Rendering engine was improved to better support the latest HTML5 features and to improve the security
  • New features to control the HTML content location, size, scaling and fitting in PDF pages
  • New features to convert the HTML forms input fields to Acro PDF Form fields to create PDF forms you can fill and submit. You can tag in the HTML document to be converted the fields to be added to PDF form.
  • New features to create a hierarchy of outlines in PDF based on heading tags (H1, H2, H3, etc.) structure from HTML. You can tag in the HTML document to be converted the HTML elements to be outlined in PDF
  • New features to create a table of contents with page numbers in PDF based on the heading tags (H1, H2, H3, etc.) structure from HTML. You can tag in the HTML document to be converted the table of contents entries. You can generate a table of contents for many HTML documents added to a PDF document
  • New features to control the page breaks in PDF. You can use the API to control the page breaks in the generated PDF document
  • New features to retrieve the position in PDF of the HTML elements from the converted HTML document. You can tag in the HTML document to be converted the HTML elements for which to retrieve position after conversion
  • New feature to convert the PDF document pages to HTML documents in memory or to HTML files on disk using the PdfToHtml class
  • Text extraction from PDF documents using the PdfTextExtract class was improved. You can keep the original positioning of the text in PDF or you can keep the reading order
  • Text searching in PDF documents using the PdfTextExtract class was improved. The search returns the positions and the bounds of the text instances in PDF document pages. You can match the case or match whole word only when searching
  • Images extraction from PDF documents using the PdfImagesExtract class was improved
  • PDF pages rasterization to images using the PdfRasterizer class was improved. You can set the color space of resulted images and the resolution of the rasterization You can now convert PDF documents to multipage TIFF images
  • Silently printing PDF documents using the PdfPrinter class was improved. You can set the printer, the paper size, orientation and margins
  • PDF security features to password protect and set permissions of the generated PDF documents were improved
  • Digital signatures support using PdfDigitalSignature class was improved. You can use digital certificates from files or from system store
  • Improved demo application for MVC available in the software package
  • Bug fixes and improvements