SageThumbs 2k - Browse /v3.0.1 at SourceForge.net

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Name	Modified	Size	InfoDownloads / Week
Parent folder
SageThumbs2K-Portable-3.0.1-arm64.zip	2026-09-10	22.9 MB	0
SageThumbs2K-Portable-3.0.1-arm64.zip.sig	2026-09-10	128 Bytes	0
SageThumbs2K-Setup-3.0.1-arm64.exe.sig	2026-09-10	128 Bytes	0
SageThumbs2K-Setup-3.0.1.exe.sig	2026-09-10	128 Bytes	0
SageThumbs2K-Portable-3.0.1.zip	2026-09-10	24.6 MB	0
SageThumbs2K-Portable-3.0.1.zip.sig	2026-09-10	128 Bytes	0
SageThumbs2K-Setup-3.0.1-arm64.exe	2026-09-10	12.8 MB	0
SageThumbs2K-Setup-3.0.1.exe	2026-09-10	14.1 MB	0
README.md	2026-09-10	7.0 kB	0
SageThumbs 2K 3.0.1 source code.tar.gz	2026-09-10	8.6 MB	0
SageThumbs 2K 3.0.1 source code.zip	2026-09-10	9.2 MB	0
Totals: 11 Items		92.3 MB	0

TL;DR

🆕 New

A size setting for the format mark in thumbnail corners

🔁 Changed

Every program and library is signed, and releases verify it

🩹 Fixed

The doctor warns when Explorer's thumbnail icons are switched off
The per-file doctor report names the drive and its type
HDR JPEG XL files no longer thumbnail almost black (fixes [#38])

Read more: everything in 3.0.1

The first update after 3.0. Three things, all from user reports in the days after the release, plus a tighter signing gate. If you are still on 2.x, the "What 3.0 brought" list at the end of these notes is the reason to update. ### New - **A size for the format mark in a thumbnail's corner.** Settings > Appearance > "Format mark size": Small (the original), Medium or Large. A designer with folders of near-identical previews asked for it, because the mark is how you tell a PSD from its JPG at a glance and the original was too small to read. The mark scales with the tile, so Large stays readable in every Explorer view. ### Fixed - **The doctor says whether Explorer draws program icons on thumbnails at all.** A new "ShowTypeOverlay" line under Windows thumbnail settings reads Explorer's "Display file icon on thumbnails" switch and warns when it is off, because with it off no thumbnail gets a corner icon, ours or Windows' own, and the corner setting "Windows' file-type icon" reads as broken while every other line is green. - **The per-file doctor report names the drive.** `st2k doctor <file>` now prints a "Volume" line: whether the drive is fixed, removable, network, optical or a RAM disk, its file system, and the device behind the letter, so a substituted (`subst`) or per-session drive, which Explorer's thumbnail helper may not see at all, is called out instead of leaving a green report next to a folder full of icons. - **HDR JPEG XL files thumbnailed almost black** ([#38](https://github.com/LunarWerxs/SageThumbs-2k/issues/38)). A `.jxl` whose base image is HDR (PQ transfer, BT.2020 primaries, the shape Google's Ultra HDR samples and Adobe's gain-map exports use) decoded to samples that still carried the PQ curve, and colour management then treated 10,000 nits as white, so a picture whose real white sits at 203 nits came out at a fiftieth of its brightness. An HDR `.jxl` now goes through the same conversion and tone map an HDR PNG or an EXR does. The SDR twin of the same picture was always fine and is unchanged. ### Changed - **Nothing ships unsigned, and the pipeline now proves it.** Every executable and library we build, including the three ImageMagick shim libraries the bundle carries, is signed by LUNARWERX LLC before the installer, the portable zip and the Windows 11 menu package pick them up, and the release run refuses to publish if any shipped binary or installer fails signature verification. ### What 3.0 brought For anyone updating from 2.x, the headlines of 3.0.0 (the full list is in that section below): - **Code-signed installers and packages** from LUNARWERX LLC, so SmartScreen and antivirus warnings on a fresh download fade with the file's age instead of never. - **Rename with pattern**, **Set as lock screen**, **Copy as data URI**, **Sort into folders by date taken**, and Fill / Fit / Span wallpaper placements in the right-click menu. - **Watermarks in the Convert dialog**, and conversions to AVIF, JPEG XL and the other ImageMagick-encoded formats keep their metadata. - **Quick preview gains**: a hex view for files nothing else can render, folder sizes, printing (Ctrl+P), a Save button for the current PDF page, animation frame or video frame, a per-extension blocklist, keyboard-reachable toolbars, and script-file highlighting. - **HDR PNGs render correctly**, AVIF colours are back after September's Windows codec change, and Canon CRW thumbnails are fast again. - **The program's icon is back in the corner of Photoshop, Illustrator and other editor files** when the corner is set to Windows' file-type icon. - **A per-file doctor** (`st2k doctor <file>`) that names the program, policy or sync client standing between a file and its thumbnail, and a diagnostics bundle safe to hand to anyone. - **A Licence page** for business seat keys, an installer question about personal or business use, settings export and import from the command line, and signature-checked self-updates. - **Portable copies keep their state in their own folder**, and the `st2k` command line and MCP tools gained `cbz`, folder recursion and richer batch reporting. - **Dozens of robustness fixes** in the shell extension: hostile or malformed files can no longer hang, crash or pile up work inside Explorer.

Verified installer

File: SageThumbs2K-Setup-3.0.1.exe
Size: 14140776 bytes
SHA-256: aa7cc70e1b5fe397f78417ce5cc899487d886e8e93a6502e5e468eea373b98f6
ARM64 installer: SageThumbs2K-Setup-3.0.1-arm64.exe
ARM64 SHA-256: 6fed17b4e53ce071e5dcf549789921f05f41b4ee185abfbacf37f3c295e8ea1c

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-3.0.1.zip
x64 portable SHA-256: e4935c2b41a648d64522a078634e269f3c4c169ac5e6837a32e4ab87fa89be07
arm64 portable: SageThumbs2K-Portable-3.0.1-arm64.zip
arm64 portable SHA-256: 1a52a8ce8611ada2e53cad71ef8d8b42c651a13123a606a7c965bb4394e0309e

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: