Apps similar to PDF Guard include SumatraPDF, which is free and open source. Other options are Okular, Foxit PDF Reader, Xournal++ and PDFgear. There's no shortage of PDF Readers like PDF Guard, with more than 50 alternatives for Windows, Mac, Linux, the web and Android.
High-performance viewer for documents and images offering split tabs, customizable single or book layouts, portals for side-by-side sections, instant search, line highlight, annotation tools, link hints, searchable highlights, session management, and TOML config.
Spain
EU
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.
United States
GermanyEU
Sejda helps with your PDF tasks: edit existing text, split, merge, extract, compress, export to other formats and more.
NetherlandsEU
Optical recognition software boasting unmatched text accuracy converts scanned documents to editable Word, Excel, or searchable PDFs while preserving layout. Supports 190 languages, simplifies processes with automated tasks, and includes PDF editing tools.
Russia
Smallpdf is the first PDF Software you will actually like. The perfect gateway to productive, portable and cost-efficient document management solutions in your everyday life.
Switzerland
Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.
United States
Native macOS app for viewing, annotating, and editing images and PDFs, featuring tools for cropping, rotating, resizing images, rearranging pages, full-screen viewing, markup, document merging, batch conversion, and export in multiple formats.
United States
PDF viewer for macOS supports scientific papers, annotations, highlights, bookmarks, split view, exporting notes, AppleScript, multiple annotation types, bibliography integration, full-screen, search, and compatibility with various macOS versions.
Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.
United States
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, share, sync, manage, sign, and more.
Canada
