Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

Secure PDF Viewer is described as 'Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions' and is a PDF Reader in the security & privacy category. There are more than 50 alternatives to Secure PDF Viewer for a variety of platforms, including Windows, Linux, Android, Mac and Web-based apps. The best Secure PDF Viewer alternative is SumatraPDF, which is both free and Open Source. Other great apps like Secure PDF Viewer are Okular, Foxit PDF Reader, Evince and MuPDF.
Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

PDF Viewer Pro is a fast and beautiful app, allowing you to view, search, and annotate PDF documents with ease on your iPhone and iPad.



PdfDing is a browser based PDF manager, viewer and editor that you can host yourself. It offers a seamless user experience on multiple devices. It's designed be to be minimal, fast, and easy to set up using Docker.






PDF X is a productive PDF reader & editor for Windows. It's powerful for users to view, print, edit, and annotate Adobe Acrobat PDFs.




Cloud-based PDF viewer and annotation tool for your browser. Perfect for Chromebook 1:1 schools. View, export, print and share your PDF files straight from your browser. Kami works on all browsers and works best with Google Chrome.
Xreader is a document viewer capable of displaying multiple and single page document formats like PDF and Postscript.
PrivatePDF is a free web tool that lets you make quick PDF edits from within your web browser, without uploading anything anywhere.




PrivatePDF is the most popular Self-Hosted alternative to Secure PDF Viewer.
Blazing fast PDF and portable eReader built on muPDF. Including the ability to save "highlights" and notes like on Kindle.



