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Home / v3.5.0
Name Modified Size InfoDownloads / Week
Parent folder
SageThumbs2K-Setup-3.5.0-amd64.exe.sig 2026-10-02 128 Bytes
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SageThumbs2K-Portable-3.5.0-arm64.zip.sig 2026-10-02 128 Bytes
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SageThumbs2K-Setup-3.5.0-amd64.exe 2026-10-02 14.9 MB
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SageThumbs2K-Portable-3.5.0-arm64.zip 2026-10-02 24.8 MB
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SageThumbs2K-Portable-3.5.0.zip 2026-10-02 26.7 MB
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SageThumbs2K-Portable-3.5.0.zip.sig 2026-10-02 128 Bytes
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SageThumbs2K-Setup-3.5.0-arm64.exe 2026-10-02 13.5 MB
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SageThumbs2K-Setup-3.5.0-arm64.exe.sig 2026-10-02 128 Bytes
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SageThumbs2K-Setup-3.5.0.exe 2026-10-02 14.9 MB
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SageThumbs2K-Setup-3.5.0.exe.sig 2026-10-02 128 Bytes
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README.md 2026-10-02 4.6 kB
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SageThumbs 2K 3.5.0 source code.tar.gz 2026-10-02 8.8 MB
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SageThumbs 2K 3.5.0 source code.zip 2026-10-02 9.8 MB
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Totals: 13 Items   113.4 MB 0
SageThumbs 2K logo

TL;DR

🔁 Changed

  • Very tall JPEG XL images thumbnail about three times faster
  • Quick preview says why a video has no sound or picture (#49)

🩹 Fixed

  • 10-bit H.264 videos, common for anime, now get thumbnails (fixes [#52])
  • DVD rips and non-square videos show at their proper shape
  • Format marks are one size on every thumbnail, with sharp letters (fixes [#50])
  • The format mark no longer hides under a widescreen video's film strip (fixes [#51])
  • Format mark stays visible after changing a file type's default program (fixes [#54])
  • 7-Zip and RAR archives with a big first picture get thumbnails (fixes [#53])
  • JPEG XL thumbnails keep their text
  • CMYK JPEG XL images get thumbnails
  • Welcome window descriptions no longer lose their last line at 500% scaling
Read more: everything in 3.5.0 - **10-bit H.264 videos ("Hi10p", common for anime) now get thumbnails** (#52). Windows has no decoder for them, so SageThumbs decodes them itself. - **Videos stored with non-square pixels show at their proper shape.** DVD rips and recordings stored at 720×480 or 720×576 are shown at 4:3 or 16:9, as players show them, instead of squeezed or stretched. Video thumbnails also no longer carry the thin band of padding some codecs store past the edge of the picture. - **Format marks are the same size on every thumbnail, with smooth, sharp letters** (#50). The mark followed each picture's shape, so a square picture got twice the mark of a widescreen video frame or a book cover, and its letters turned jagged and blurry once Explorer resized the thumbnail. - **On widescreen videos the format mark no longer hides under Explorer's film-strip border** (#51). - **The format mark stays visible after you pick a new default program for a file type** (#54). A program such as Readest puts its own icon in that corner, and choosing it after SageThumbs was set up let the icon cover the mark. - **7-Zip and RAR archives whose first picture is larger than 8 MB now get thumbnails** (#53), as zip and tar archives already did. That includes `.cb7` and `.cbr` comics with big scans. - **JPEG XL thumbnails keep their text.** The reference encoder saves repeated letters in a screenshot or a lettered comic page once and stamps them into place, and the thumbnail skipped that step, so pages came out with most of their text missing and speech bubbles empty. It now draws them. - **CMYK JPEG XL images get thumbnails.** They failed to open at all before. - **Very tall JPEG XL images, such as webtoon strips, usually thumbnail about three times faster.** - **The Quick preview now says why a video has no sound or no picture** (#49). Windows has no decoder for DTS sound at all, and HEVC, AV1 and VP9 video need extensions from the Microsoft Store, so such a video used to play in silence or show a still frame with no explanation. Codec packs such as K-Lite cannot fill the gap, because they plug into a different part of Windows than the one the preview plays through. The title bar now names what is missing, for example "No sound: DTS isn't supported by Windows". - **At very high display scaling (500%), the welcome window's descriptions no longer lose their last line.**

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-3.5.0.exe · SHA-256 c7c298ff97db527ce29e9cc65bb3dd48e35f1529b282732c155ed3c56a04fafd
  • ARM64 installer: SageThumbs2K-Setup-3.5.0-arm64.exe · SHA-256 23cf7a57d0aa9f58e09545323e80e4cb930761bece10e9f134a80578f7c89314
  • x64 portable: SageThumbs2K-Portable-3.5.0.zip · SHA-256 d3a0d04b3cbe489e25eabbdf91567f593c536cdc2abc9e53783a297954f5197c
  • arm64 portable: SageThumbs2K-Portable-3.5.0-arm64.zip · SHA-256 169bacfe194581332f93fee8a608a24390181201cde8271209438b2d8caeb727

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-3.5.0-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 2026-10-02