
Description: PDF Reader Online is a free web-based PDF reader that allows you to view, print, and annotate PDFs directly in your web browser without needing to download any software. It offers basic PDF viewing and annotation features.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MuPDF is a free, open source PDF viewer and toolkit. It is lightweight, fast, and cross-platform, supporting Windows, macOS, Linux, Android, and iOS. MuPDF allows you to view PDFs quickly and smoothly while using minimal system resources.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API