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.

Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.

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.

Feature-rich PDF editor offering direct content editing, ABBYY OCR, viewing, annotation, form filling, PDF merging, compression, and encryption. Operates efficiently offline, requiring no registration and no ads, while providing privacy-focused features and convenient portability.

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.

MuPDF is a highly versatile, customizable PDF and XPS interpreter solution that can be used across a wide range of applications as a PDF renderer, viewer, or toolkit.

Seamlessly view, annotate, and collaborate on PDFs with freehand drawing and sticky notes. Utilize cloud storage for effortless access and upgrade for advanced editing and conversion to formats like Word and Excel.

PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that allows you to display within Mozilla Firefox almost all PDF files found on the web without a plugin.

Xodo is the ultimate cross-platform PDF viewer and annotator. Powerful, fast, and optimized for all phones and tablets, Xodo makes it easy to access, edit, mark up, sort, share, sync, manage, sign, and more with even the most complex PDF documents.

Nitro offers comprehensive PDF solutions for editing, creating, and converting, alongside OCR and e-signature tools. Supports Mac, Windows, and iOS, providing a user-friendly interface with industry-standard security features. Ideal as an Adobe Acrobat alternative.

Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.

KDAN PDF Reader is tailored for a hybrid workplace, providing AI-driven PDF document services to enhance efficiency in cross-device document management and enable seamless workflows across mobile and desktop platforms.