Sumatra PDF v3.6 Portable
Sumatra PDF v3.6 Portable
Sumatra PDF v3.6 is a lightning-fast, open-source document viewer that prioritizes minimalist design and high-speed performance. This major March 17, 2026 release (v3.6) marks a significant evolution for the reader, introducing highly requested features like Brotli-compressed PDF support and a powerful translation engine. Designed as a svelte alternative to bloated document suites, Sumatra PDF handles everything from professional PDFs and eBooks to digital comic books without taxing your system resources.
Key Features
- Universal Format Support: A single, tiny executable that opens PDF, ePub, MOBI, XPS, DjVu, CHM, and Comic Book archives (CBZ, CBR).
- Integrated Web Translation: New in v3.6, you can select text and instantly translate it via Google Translate or DeepL directly from the context menu.
- Advanced Command Palette (Ctrl+K): Features an improved "Visual Studio Code" style command bar to quickly switch between tabs, search document history, or trigger deep system functions.
- Lazy Loading & Faster Sessions: Version 3.6 introduces "Lazy Loading" (enabled by default), which speeds up session restoration by only loading documents when their specific tab is selected.
- Customizable Keyboard Shortcuts: Fully rebind any action to your preferred key combinations via the advanced settings file, providing a truly personalized navigation experience.
- Brotli & Modern Format Support: Now supports Brotli-compressed PDFs and offers improved rendering for modern web image formats like WebP and AVIF.
- Dark Mode & UI Theming: Includes a refined Dark Mode with customizable background and text colors to reduce eye strain during long reading or research sessions.
- Zero-Registry Portability: This version is 100% portable. It consists of a single file that stores all settings locally, making it the perfect document companion for your USB drive or cloud storage.