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Sumatra PDF 是一款強大、輕巧、可攜式（Portable）且開啟快速的 PDF 閱讀器，本身的使用者介面設計也很簡單，沒有太多複雜的功能，可以開啟、瀏覽、複製或列印 PDF 文件內容，優點是速度快、佔用資源少。

Sumatra PDF is a free PDF, eBook (ePub, Mobi), XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. The software is powerful, small, portable and starts up very fast.

SumatraPDF is a multi-format (PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS, DjVu) reader for Windows under (A)GPLv3 license, with some code under BSD license (see AUTHORS).

Portable version is a single executable, can be run from USB drive and doesn't write to registry.

[下載] Sumatra PDF 官方載點 免安裝版→ [32位元] [64位元] [64位元ARM] 安裝版→ [32位元] [64位元] [64位元ARM] 相關連結→ [軟體說明] [其他載點及舊版下載] 阿榮推薦付費軟體 ★ PDF-XChange Editor- PDF檔檢視、編輯、修改工具 (取代Acrobat的PDF編輯軟體)

SumatraPDF 免費 PDF 閱讀器，可查看PDF, EPUB, MOBI, CHM, XPS, DjVu, CBZ 和 CBR格式的文件，可以將頁面文字高光標記重點、加入文字、添加印章等簡單的功能，以下提供官方的載點，支援繁體中文免安裝版。

Sumatra PDF is a fairly young project aiming to create a small, simple and fast PDF viewer. It main features are showing PDFs and starting up really fast - and it does both just perfectly.