Sumatra PDF 2.3.1

Sumatra PDF is a free PDF, eBook (MOBI), XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. Sumatra PDF is small and starts up very fast. Simplicity of the user interface has a high priority. Portable version included (a single executable that can be run e.g. from USB drive and doesn't write to registry).

What's new in version 2.3.1:

  • no longer using SSE2 to support old computers

Changes in Sumatra PDF 2.3:

  • Greater configurability via advanced settings
  • "Go To Page" in ebook ui
  • add View/Manga Mode menu item for Comic Book (CBZ/CBR) files
  • new key bindings:
    • Ctrl-Up : page up
    • Ctrl-Down : page down
  • add support for OpenXPS documents
  • support Deflate64 in Comic Book (CBZ/CBR) files
  • fixed missing paragraph indentation in EPUB documents
  • printing with "Use original page sizes" no longer centers pages on paper
  • reduced size. Installer is ~1MB smaller

Download: Sumatra PDF 2.3.1 Installer | 3.9 MB (Freeware)
Download: Sumatra PDF 2.3.1 Portable | 2.5 MB
Download: Sumatra PDF 64-bit | 4.2 MB
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6 Comments

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All that was removed is SSE2 support so systems that support SSE3 and above will work, but the removal of SSE2 is silly. This app is supposed to be lightweight and good for older pc's or newer but the developer is clearly going downhill.

You're mistaken soldier1st, SSE2 is a supplementary instruction set (like SSE3 or SSE4.2 for example). By removing the use of SSE2 instructions in SumatraPDF they're allowing machines which don't have that instruction set to use SumatraPDF.

They enabled officially SSE2 in 2.3 but probably due to reports of people who could not use SumatraPDF anymore they released 2.3.1 without it.

KaoDome said,
You're mistaken soldier1st, SSE2 is a supplementary instruction set (like SSE3 or SSE4.2 for example). By removing the use of SSE2 instructions in SumatraPDF they're allowing machines which don't have that instruction set to use SumatraPDF.

They enabled officially SSE2 in 2.3 but probably due to reports of people who could not use SumatraPDF anymore they released 2.3.1 without it.


Ty for the clarification.

Well this update sucks, I'll be sticking with 2.3.0. XP users and people on REALLY old PC's might be happy about this, but anyone on more modern computers now can't take advantage of the huge speed improvements (up to 400%) that came with SSE2.

If you had no problems with version 2.3.0, I would just stick with that.