> ## Documentation Index > Fetch the complete documentation index at: https://webviewer-docs.mupdf.com/llms.txt > Use this file to discover all available pages before exploring further. # WebViewer Developer Documentation ## A customizable PDF Viewer Component for the Web **MuPDF WebViewer** is an easy to use drop-in UI component for web pages which allows for in-context PDF viewing. * **Easy Integration** Drop it into your application with just a few lines of code. * **Built for AI** Designed to work seamlessly with LLMs, making it ideal for AI-powered PDF applications. * **Responsive Design** Deliver a flawless experience across devices, including desktops, tablets, and smartphones. * **View Annotations and Markups** With MuPDF WebViewer you get the full picture of the PDF with all the annotations retained. * **High Performance** Optimized for speed and smooth navigation, even with large or complex documents. * **Advanced Search** Find words quickly throughout your PDF. Search by case sensitivity or regular expression. * **Customizable Options** Customize the viewer to suit your brand or display the things you need.