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Home / v3.4.0
Name Modified Size InfoDownloads / Week
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SageThumbs2K-Portable-3.4.0-arm64.zip.sig 2026-09-27 128 Bytes
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SageThumbs2K-Setup-3.4.0-amd64.exe 2026-09-27 14.3 MB
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SageThumbs2K-Setup-3.4.0-amd64.exe.sig 2026-09-27 128 Bytes
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SageThumbs2K-Portable-3.4.0-arm64.zip 2026-09-27 23.6 MB
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SageThumbs2K-Portable-3.4.0.zip 2026-09-27 25.4 MB
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SageThumbs2K-Portable-3.4.0.zip.sig 2026-09-27 128 Bytes
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SageThumbs2K-Setup-3.4.0-arm64.exe 2026-09-27 13.0 MB
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SageThumbs2K-Setup-3.4.0-arm64.exe.sig 2026-09-27 128 Bytes
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SageThumbs2K-Setup-3.4.0.exe 2026-09-27 14.3 MB
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SageThumbs2K-Setup-3.4.0.exe.sig 2026-09-27 128 Bytes
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README.md 2026-09-27 4.3 kB
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SageThumbs 2K 3.4.0 source code.tar.gz 2026-09-27 8.4 MB
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SageThumbs 2K 3.4.0 source code.zip 2026-09-27 9.4 MB
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Totals: 13 Items   108.4 MB 0
SageThumbs 2K logo

TL;DR

🆕 New

  • FreeCAD backup files get thumbnails
  • Combine scans into a PDF you can search and copy

🔁 Changed

  • Quick preview stays above the taskbar and remembers where you put it
  • The doctor names the thumbnail handler Windows actually uses (#47)
  • Image resizing and rotation are tested far more thoroughly

🩹 Fixed

  • Thumbnails in OneDrive, Synology Drive and other cloud folders (fixes [#16])
  • Thumbnails no longer stop after a busy session
Read more: everything in 3.4.0 - **Thumbnails in OneDrive, Synology Drive and other cloud folders.** Windows asks only the cloud app for a thumbnail of a file in a synced folder, even a fully downloaded one, so Paint.NET, Affinity, PSD and every other SageThumbs format showed a plain icon there (fixes [#16]). SageThumbs now takes its turn first for files that are on your PC and hands everything else, including online-only files, back to the cloud app; nothing is ever downloaded just to draw a thumbnail. On by default, with a switch in Settings > General, and `st2k doctor` now reports each cloud folder and whether it is linked. - **Thumbnails no longer stop after a busy session.** When Explorer gave up on a slow file mid-decode, SageThumbs could lose one of its four ImageMagick slots for good; after a few of those every exotic-format thumbnail stalled, Explorer kept giving up, and only a restart brought them back. A slot whose owner is gone is now taken over at once. - **Quick preview stays above the taskbar and remembers where you put it.** A tall picture no longer opens or grows underneath the taskbar, and the window opens where you last dragged it (double-click its title bar to go back to centred). - **FreeCAD backups** (`.FCBak`, `.FCStd1`) get the same thumbnail as the `.FCStd` they were saved from (363 file types in all). - **`st2k doctor` names the thumbnail handler Windows actually uses** for a file, and says when that handler belongs to another program or is built for a different processor than this PC (an x64-only DLL on an ARM64 PC, [#47]). - **Searchable PDFs:** the new right-click **Combine into searchable PDF (OCR)**, `st2k pdf --searchable` and the MCP `pdf` tool's `searchable` option read every page with Windows' own OCR and add an invisible text layer, so scans and photos turned into a PDF can be searched, and their text selected and copied, in any PDF viewer. Pages OCR could not read still go in without text, and the CLI (`no text:` line) and JSON (`pages_without_text`) say how many. - **Hardening.** The step every decoded picture goes through before it becomes a thumbnail or a preview (shrinking, enlarging, rotating, and the contact sheet for archives) is now fuzzed with images that are always valid, in every pixel format and shape, and checked for the right size and colour rather than only for crashes. The deep fuzz sessions now run every night instead of only before a release.

Downloads

Every file below is code-signed by LUNARWERX LLC; the SHA-256 lets you check a download is the one published here.

  • x64 installer: SageThumbs2K-Setup-3.4.0.exe · SHA-256 bc6c716852a7a158b14f0e3bc555a8fd3fbc91dc83d4f5947645a7c61cbe8140
  • ARM64 installer: SageThumbs2K-Setup-3.4.0-arm64.exe · SHA-256 ebd14063bb57b2075db6d1614c2966e58a6ad7af1977aa251f78e460c007b5d3
  • x64 portable: SageThumbs2K-Portable-3.4.0.zip · SHA-256 9922716f1cbef6e4d4b266b42b9f43449ac9046cebdf89076d4f31a292e1ce79
  • arm64 portable: SageThumbs2K-Portable-3.4.0-arm64.zip · SHA-256 45516d4c4e0cd95b59b96c57e1fcdf8feb22d14d1d781f70bfbdb1a9360ff796

Portable: unzip and run, nothing is installed. st2k register (or Settings, Advanced) turns on Explorer thumbnails and the classic right-click menu for your account; only the preview pane, the Details pane and the Windows 11 compact menu still need the installer. SageThumbs2K-Setup-3.4.0-amd64.exe is the x64 installer again, under the name copies older than 1.3.6 look for; download the plain one.

💬 Questions, ideas, or a hello: the LunarWerx Discord.

Source: README.md, updated 2026-09-27