# EleViewer > The portable, offline study workspace for Windows EleViewer is a free, open-source Windows document viewer for students and people who need to work without Microsoft Office, an installer, or an internet connection. EleViewer is a free, portable Windows study workspace. It allows you to open DOCX, XLSX, PPTX, PDF, Markdown, CSV, HTML, and TXT without Microsoft Office in one portable app with PDF text-to-speech, built-in web browser, find & replace, autosave, file vault, and session restore. ## Quick Facts - **OS**: Windows 10, Windows 11 - **License**: GPLv3 (Free and Open Source) - **Pricing**: $0 (No in-app purchases) - **Installation**: Portable single .exe (No admin rights required) - **Telemetry**: Zero telemetry, fully offline ## Core Features - **PDF Text-to-Speech**: Uses native Windows voices (SAPI) to read PDFs aloud. - **Vault Sidebar**: Organize course folders directly in the app. - **Session Restore**: Reopens tabs exactly where you left them. - **Built-in Web Panel**: Browse the web side-by-side with documents using Ctrl+T. - **Quick Switcher**: Press Ctrl+Q to fuzzy-search recent files. - **File Support**: DOCX, XLSX, PPTX, PDF, Markdown, CSV, HTML, TXT. ## Comparison - **EleViewer vs Sumatra PDF**: EleViewer supports editing markdown and rendering DOCX/XLSX/PPTX natively, includes a web panel, and has text-to-speech built in. Sumatra PDF is faster for raw PDF viewing but lacks DOCX support and TTS. - **EleViewer vs Microsoft Word Viewer**: MS Word Viewer is discontinued. EleViewer is actively maintained and supports many more formats. ## Resources - Homepage: https://eleviewer.vercel.app - Docs: https://eleviewer.vercel.app/docs - Source: https://github.com/karefined-eng/eleviewer