Alternatives to PRO Viewer

ViewAnyFile.app suits people who need to inspect or convert varied file types in a browser across desktop and mobile devices.

Evince suits Linux desktop users who need to view supported document formats, fill interactive forms, or annotate PDFs.

It suits Windows users who want image browsing, editing, conversion, or batch work in one program.

IrfanView suits Windows users who need image viewing alongside batch processing, conversion, and editing tools.

File Viewer for Android

This app suits Android users who want file browsing alongside tools for viewing, converting, and extracting files.

Geeqie

It suits people who want a folder-based image viewer and organiser with metadata, duplicate-finding and file-management tools.

HFSExplorer suits users who need to browse or extract files from Mac-formatted disks and images on Linux, macOS, or Windows.

It suits Windows users who want a free reader with broad document-format support, annotation and form tools, accessibility features, or portable use.

nomacs

nomacs suits people who need a free image viewer with browsing, adjustment and comparison tools.

It suits people who need to view and annotate documents across devices, including in groupware or messaging settings.

OmniViewer suits people who want to inspect or edit files in a browser, including CSV, PDF, JSON, Markdown, and ZIP files.

Universal Viewer suits Windows users who need to inspect varied image, media, document, and text files in one application.

OpenFiles

OpenFiles suits people who want file browsing, editing, conversion, previews, and AI assistance in one desktop workspace.