Get a Free Software PDF reader!
The Portable Document Format (PDF) is a popular format to publish formatted text and documents. There are several different versions of it, some qualifying as an Open Standard, some certified by ISO and some encumbered by software patents. You might want to promote the versions that are Open Standards, because Open Standards guarantee interoperability, competition and choice. Read more...
There are many programs to read and write PDF documents. All of the PDF readers in the following list are Free Software, respecting your basic four freedoms to use, study, share, and improve them. This gives you control over your computer and helps protect your privacy. Read more...
The document viewer of the Gnome project can display many document formats beside PDF.
a free PDF, eBook, XPS, DjVu, CHM, Comic Book reader for Windows. Sumatra PDF is powerful, small, portable and starts up very fast.
The document viewer of the KDE project also displays postscript, doc, odt and other formats. It is well integrateed with the KDE web browsers Konqueror and Rekonq.
A lightweight, straightforward pdf viewer using a plain motif interface. The XpdfReader builds are non-free, we advise against them.
PDF.JS is not a standalone application for viewing pdf, but a plugin available for various web browsers. It may suit you when you come across a lot of pdf files online or in an environment where you cannot or do not want to install a full desktop application.
gvPlatforms:GNU/LinuxMac OS X
A lightweight postscript and pdf viewer with xaw3d interface. Successor to ghostview.
sioyekPlatforms:GNU/LinuxMac OS XWindows
A PDF viewer designed for reading research papers and technical books.
Other proprietary alternatives to Adobe's PDF reader also exist, but, like it, their internal working is a trade secret and these programs do not respect your right to control your own privacy and data.
Help us translating the interface / the download webpages of your favorite PDF reader!