iTop PDF is described as 'Full-featured PDF tool to view, edit, comment, and convert documents. Supports conversion between PDF and other formats, offering password protection' and is a PDF Reader in the office & productivity category. There are more than 50 alternatives to iTop PDF for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best iTop PDF alternative is SumatraPDF, which is both free and Open Source. Other great apps like iTop PDF are Okular, Foxit PDF Reader, Evince and MuPDF.
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
Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.
United States
Document Viewer is a highly customizable document viewer for Android, fork of the last GPL version of EBookDroid .
Germany
EU
Comprehensive solution for editing, signing, form filling, OCR scanning, commenting, converting, and redacting PDFs, with AI-driven analysis and content extraction, data export to spreadsheets, text-to-speech, seamless use across desktop and mobile, and batch processing.
Taiwan
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.
qpdfview is a Qt-based tabbed document viewer using the Poppler library for PDF rendering and CUPS for printing. Support for the DjVu and PostScript formats can be added via plugins.
GermanyEU
Atril is a simple multi-page document viewer. It can display and print PostScript (PS), Encapsulated PostScript (EPS), DJVU, DVI, XPS and Portable Document Format (PDF) files. When supported by the document, it also allows searching for text, copying text to the clipboard...
Universal Viewer is an advanced file viewer for wide range of formats. Supported file formats are:
Russia
Zathura is a highly customizable and functional document viewer. It provides a minimalistic and space saving interface as well as an easy usage that mainly focuses on keyboard interaction.
GermanyEU
Besides exceptionally fast launching and displaying speed, Gaaiho Reader is reliable in printing, filling forms annotating documents and adding bookmarks.
Taiwan
In version 8, Google Chrome introduced a free PDF viewer, installed by default. While this plug-in lacks many features of the Adobe Acrobat Plug-in, it is much faster and lighter, and updates with the browser rather than an external utility.
United States
