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One of the main advantages of PDFium is its small size and fast performance. It is designed to be lightweight and efficient, which makes it an excellent choice for rendering PDF documents on low-end devices or in resource-constrained environments. PDFium also supports many PDF features, such as annotations, bookmarks, and form filling. Additionally, it is relatively easy to use, with a simple API that can be integrated into any C# application. However, PDFium has limitations that may make it less than ideal for some applications. For example, PDFium does not have built-in support for text extraction or conversion to other formats, such as images or HTML. This can make it challenging to work with PDF documents in specific scenarios. Additionally, PDFium does not have the same level of support or community as some other PDF rendering engines, making it more challenging to find answers to problems or get help when needed. This link contained a detailed comparison between both homepage If you want a better alternative to PDFium for C# development, IronPDF is an excellent choice. IronPDF is a powerful and feature-rich PDF library that provides a wide range of functionality for working with PDF documents. It has built-in support for text extraction, image conversion, and HTML conversion, which makes it much easier to work with PDF documents in a variety of scenarios. Additionally, IronPDF has a large and active community of developers, which means that help and support are always available when needed.