The best alternative to Okular is SumatraPDF, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Okular and 14 are so hopefully you can find a suitable replacement. Other interesting alternatives to Okular are Foxit PDF Reader, Evince, LibreOffice - Draw and MuPDF.
This free, open-source viewer for Windows supports multiple formats like PDF, eBooks (ePub, Mobi), CHM, and Comic Books (CBZ, CBR). Prioritizing simplicity and speed, it offers a lightweight, portable design with a minimalist interface, catering to users seeking fast and efficient document viewing.
Foxit Reader offers a lightweight PDF viewing experience across multiple platforms with features such as annotation, form filling, signing, cloud storage integration, collaborative review options, heightened security via Trust Manager, and organizational tools like Group Policy and XML Configuration.
Evince (or GNOME Document Viewer) is a document viewer for multiple document formats: PDF, Postscript, djvu, tiff, dvi, XPS, SyncTex support with gedit, comics books (cbr,cbz,cb7 and cbt) and others. See Supported Document Formats for details.
Draw lets you produce anything from a quick sketch to a complex plan, and gives you the means to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is a an excellent package for producing technical drawings, general posters, and much else.
MuPDF offers a highly versatile PDF, XPS, and eBook interpreter, customizable as a renderer, viewer, or toolkit. Features include digital signatures, redactions, form filling, annotations, and page manipulation, ideal for mobile, eBooks, and embedded apps supporting Java, C++, and Python.
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.
The top AEC PDF app to markup and manage drawings and documents. Ideal for replacing pen and paper, avoid printing documents again by using our intuitive feature set that makes marking up a PDF easy. Open or create a new PDF, markup using our extensive array of tools, then save...
WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options. It uses the free DjVuLibre library to decode DjVu documents. DjVu is a web-centric format and software platform for distributing documents...
Universal Viewer is an advanced file viewer for wide range of formats. Supported file formats are:
Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.
Sonic PDF is your go-to PDF editor for Windows, offering intuitive tools for document processing.
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Sumatra doesn't have comments and fill forms functionality as Okular does.