SageThumbs 2k - Browse /v3.0.2 at SourceForge.net

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Name	Modified	Size	InfoDownloads / Week
Parent folder
SageThumbs2K-Setup-3.0.2-amd64.exe	2026-09-11	14.2 MB	0
SageThumbs2K-Setup-3.0.2-amd64.exe.sig	2026-09-11	128 Bytes	0
SageThumbs2K-Portable-3.0.2-arm64.zip	2026-09-11	22.9 MB	0
SageThumbs2K-Portable-3.0.2-arm64.zip.sig	2026-09-11	128 Bytes	0
SageThumbs2K-Setup-3.0.2-arm64.exe.sig	2026-09-11	128 Bytes	0
SageThumbs2K-Setup-3.0.2.exe.sig	2026-09-11	128 Bytes	0
SageThumbs2K-Portable-3.0.2.zip	2026-09-11	24.7 MB	0
SageThumbs2K-Portable-3.0.2.zip.sig	2026-09-11	128 Bytes	0
SageThumbs2K-Setup-3.0.2-arm64.exe	2026-09-11	12.8 MB	0
SageThumbs2K-Setup-3.0.2.exe	2026-09-11	14.2 MB	0
README.md	2026-09-11	3.7 kB	0
SageThumbs 2K 3.0.2 source code.tar.gz	2026-09-11	8.7 MB	0
SageThumbs 2K 3.0.2 source code.zip	2026-09-11	9.3 MB	0
Totals: 13 Items		106.7 MB	0

TL;DR

🩹 Fixed

HDR AVIF thumbnails no longer come out blown out (fixes [#39])

Read more: everything in 3.0.2

- **HDR AVIF thumbnails no longer come out blown out** ([#39](https://github.com/LunarWerxs/SageThumbs-2k/issues/39)). An AVIF whose base image is HDR (PQ transfer, BT.2020 primaries, the same shape as the JPEG XL fixed in 3.0.1) rendered as a bleached picture with every bright area clipped to white: Windows' own AV1 decoder hands an HDR picture back as linear light, and everything brighter than 80 nits was being cut off on the way to 8 bits. Where the bundled ImageMagick decoded the file instead, the raw PQ signal was shown as if it were sRGB, so the same picture came out dark and flat. Both now go through the conversion and tone map an HDR PNG, JPEG XL or EXR does, HDR HEIC included. The SDR twin of the same picture is unchanged. - For the few installations on a business licence: the Licence page now says which licence you hold, a revoked seat shows as revoked straight away, and it shows when your updates window ends. Personal use is unaffected.

Verified installer

File: SageThumbs2K-Setup-3.0.2.exe
Size: 14153816 bytes
SHA-256: 06aadcae85b12a2a40bd6be50081a36b359166ea986dbc620220bdc4a4434ae4
ARM64 installer: SageThumbs2K-Setup-3.0.2-arm64.exe
ARM64 SHA-256: 0fb7ff1964a7cb37b5b59d163b873a52a08089dc670540fa2fb512e3dd342895
x64 installer, second copy: SageThumbs2K-Setup-3.0.2-amd64.exe is the same file as the verified x64 installer above, published under a name that lists first so that copies older than 1.3.6 can update themselves. Download the plain one.

Portable (no installer)

Extract and run. Nothing is installed, nothing goes in the registry, no admin needed. Settings live in SageThumbs2K.ini next to the exe.

You get the app and the command line tool: settings, convert and resize, quick preview, screenshots, OCR, the colour picker and the folder tools.

Explorer thumbnails and the classic right-click menu work too. Turn them on with st2k register, or the button in Settings under Advanced. That registers the handler for your user account only: no installer, no administrator rights, nothing written machine-wide. st2k register --off undoes it, and you should run that before moving or deleting the folder, otherwise Windows is left pointing at a file that has gone.

Three things still need the installer, because Windows only accepts them registered for the whole machine: the Explorer preview pane, the Details pane columns, and the Windows 11 right-click menu (the compact one).

x64 portable: SageThumbs2K-Portable-3.0.2.zip
x64 portable SHA-256: 723e8093b2a37b2f38176ec28c49912232e087f6b05c81c29b8f731d2caf0db2
arm64 portable: SageThumbs2K-Portable-3.0.2-arm64.zip
arm64 portable SHA-256: 7c0141ec055978788fca9914546762622f24638948a7d9b7e7b8c86833b89330

Antivirus / SmartScreen: these builds are code-signed. A brand-new signed file with no download history draws reputation-based warnings. Scan results for these exact bytes: