SageThumbs 2K 0.7.1

SageThumbs 2K 0.7.1

• See a screenshot's exact size while you drag it. When you drag out a region to capture, a small width × height readout now sits at the corner of the selection, so you can size things precisely (in real pixels).
• The screenshot / action hotkeys stay working. The small background helper that powers the global hotkeys now restarts itself automatically if it ever stops, and just opening Settings brings it back if it was down — so your hotkey won't quietly stop firing. Its live status shows under Settings ▸ Advanced ▸ "Hotkey service".
• New: right-click ▸ Upload (copy link). Right-click an image (or several) and upload straight to a free, no-account host (catbox.moe by default), with the link(s) copied to your clipboard — your original files are left untouched. The resulting links open in a small window you can select and copy from.
• About box opens centered, with the proper GitHub icon. The About window now appears centered over Settings instead of stuck in the top-left corner, and its GitHub badge shows the real GitHub logo.
• "Hide tray icon" moved to Advanced. That toggle now lives under Settings ▸ Advanced ▸ "Hotkey service", next to the Restart button.

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Updating: existing users can update in-app — Settings ▸ Advanced ▸ Check for updates downloads and installs it automatically — or grab the installer below.

SageThumbs 2K 0.7.0

SageThumbs 2K 0.7.0

✨ Headline — a redesigned Settings window

The old single long scroll is gone. Settings now opens with a Windows 11-style category rail (General · File types · Ebook/comic · Right-click menu · Screenshots · Quick action · Advanced) and a clean content page per category — with on/off toggle switches, category icons, and a titled header on each page. Everyday options sit up front; diagnostics, updates and backup tuck under Advanced. Same settings, far less clutter.

🆕 New

• Assign your own hotkey to a tool — pick an action (color picker, screenshot, Convert…, rotate, move-to-folder, strip metadata, open Settings) and a shortcut; it works anywhere and runs on whatever you've selected in Explorer.
• DSD audio (.dsf) album-art thumbnails — now 316 supported file types.
• AVIF / JPEG XL quality slider in the Convert… dialog.
• Cleaner right-click menu on music files — image-only actions (resize, rotate, wallpaper) no longer show on audio.

🐞 Fixes

• Transparent Photoshop files preview correctly (no more solid-white background).
• Image dimensions / camera / audio details now appear in the Explorer details pane — plus date taken, GPS, colour depth, DPI, length, bitrate, genre, year — and are offered as sortable/groupable columns and indexed for Search.
• More video formats thumbnail (.ts / .m2ts / .mts / .ogv).
• "Keep original file date" now applies to the Convert… dialog.
• "Show menu on all file types" now works on the Windows 11 default menu.
• Cleaner uninstall (no stray registry entries), and a security-hardening pass on the one-click updater.

Install

Download SageThumbs2K-Setup-0.7.0.exe below and run it. Windows 11 / 10, 64-bit (~9 MB). Free for personal use (PolyForm Noncommercial 1.0.0).

SageThumbs 2K 0.6.3

One-click updates — SageThumbs can now update itself.

When a newer version is available, Settings ▸ Check for updates offers to download and install it for you: a progress bar shows the download, the file is integrity-checked before anything runs, Windows asks once for permission, and the new version installs in the background and lets you know when it's done with a quiet notification. You can still download the installer here by hand if you prefer.

Coming from an older 0.6.x build? You also get a serious fix.

The previous release (0.6.2) fixed a serious bug where file dialogs could hang for up to ~2 minutes — for instance when attaching or uploading a file in your browser — with the preview pane coming up blank/white. That fix, plus a full hardening pass so no single file can stall Explorer, a file dialog, or the preview host, is included here. If you skipped 0.6.2, updating now gets you current.

Install

Download SageThumbs2K-Setup-0.6.3.exe below and run it. It's unsigned, so Windows SmartScreen may warn — click More info → Run anyway.

Full changelog: docs/CHANGELOG.md

SageThumbs 2K 0.6.2

A bug-fix release — and an apology.

Some recent 0.6.x builds had a serious bug: opening a file dialog — for example, attaching or uploading a file in your browser — could hang for up to ~2 minutes, and the preview pane could come up blank/white. A tool whose entire job is to not break your shell shouldn't do that, and missing it stung — the first couple of attempts didn't fully land, either. It's properly fixed now, and I followed it with an audit that tracked down and fixed every similar issue elsewhere in the shell code. Sorry to anyone it bit, and thank you for your patience.

What's fixed

• File dialogs no longer hang. The image preview now runs on its own message-pumping thread, so closing the dialog is instant and the preview paints reliably.
• Preview pane follows your theme — its background now matches Windows dark/light mode instead of always being white, even when the host dialog hands it the wrong color.
• No file can stall the shell — a hardening pass put a strict time limit (and crash-safety guard) on every in-process decode path: PDF thumbnails, the right-click menu preview, OCR, the Details/property handler, and the SVG / video / camera-RAW helpers. Earlier builds could stall on a malformed PDF or a very large image.
• Rare close-time crash fixed — background decode helpers now keep the extension loaded until they finish, so the shell can't unload it out from under a running decode.

Install

Download SageThumbs2K-Setup-0.6.2.exe below and run it. It's unsigned, so Windows SmartScreen may warn — click More info → Run anyway.

Full changelog: docs/CHANGELOG.md

SageThumbs 2K 0.6.1

SageThumbs 2K 0.6.1

• Crisper thumbnails at large / Hi-DPI icon sizes — the maximum generated thumbnail edge is now 1024 px (was 256), so 4K displays and the larger ("jumbo") icon views get sharp thumbnails that stay cached instead of being re-decoded on every refresh.
• Audio waveform thumbnails — WAV, AIFF and AIFF-C files with no embedded cover art now show a drawn waveform instead of a blank icon. Files that have album art still show the artwork.
• +1 format: AIFF-C (.aifc) → 315 supported file types.

Install

Download SageThumbs2K-Setup-0.6.1.exe below and run it. The app is unsigned, so Windows SmartScreen may warn — click More info → Run anyway.

SageThumbs 2K 0.6.0

✨ What's new in 0.6.0

📐 Details where you actually look
Image dimensions, camera info, and audio tags now show up in Explorer's Details pane, hover tooltips, and sortable columns — for the 300+ formats Windows can't read on its own (PSD, RAW, Krita, ebooks, and more).

🎨 Correct colors
Wide-gamut images (Display P3 / Adobe RGB) and CMYK files now thumbnail in proper sRGB instead of looking over-saturated — including AVIF/HEIC (iPhone photos) and CMYK JPEGs.

🧩 More formats
Autodesk Fusion 360 .f3d thumbnails. (314 formats total.)

🔧 Repair file associations
A new Settings → Diagnostics button re-claims thumbnails when another app takes them over, and clears the stale cache.

🤖 AI / CLI
The MCP server gained a view tool (an agent can see any of the 314 formats as an image) plus compress.

📦 Leaner + tougher
~1.5 MB smaller installer, plus a hardening pass — fuzzing, Miri, and COM round-trip tests across the parsers and shell handlers.

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Install: download SageThumbs2K-Setup-0.6.0.exe below and run it. It's unsigned, so Windows SmartScreen may warn — click More info → Run anyway.

SageThumbs 2K 0.5.0

SageThumbs 2K 0.5.0 — Explorer thumbnails for 313 file types Windows can't read, plus a right-click image toolkit.

What's new

• 🎬 Video thumbnails, done properly — Explorer now reliably shows a thumbnail for your videos, and it's a representative frame from about a third of the way in (not the black intro, fade-in, or studio logo). Covers MP4, MOV, M4V, MKV, WebM, AVI, and WMV.
• ⚡ Fast even on huge 4K files — for MP4/MKV we read the video's own index and pull just the single frame we need (a few MB) instead of scanning the file, so a folder of multi-gigabyte movies on a slow drive thumbnails quickly — and can no longer peg a CPU core or leave blank tiles that never resolve.
• ℹ️ Formats Windows itself has no codec for (MPEG-1/2 .mpg/.mpeg, Flash .flv) keep the normal file icon — nothing can produce a thumbnail for them without an installed codec.

Full changelog

Install

Download SageThumbs2K-Setup-0.5.0.exe below and run it.

ℹ️ The installer isn't code-signed, so Windows SmartScreen may show a one-time "unknown publisher" prompt — click More info → Run anyway.

SageThumbs 2K 0.4.9

SageThumbs 2K 0.4.9 — Explorer thumbnails for 313 file types Windows can't read, plus a right-click image toolkit.

What's new

• 🎨 Correct colors for wide-gamut photos — Display-P3 / Adobe RGB images (most modern phone/camera photos) are color-managed to sRGB instead of rendering over-saturated.
• 🔍 Crisp pixel-art & icons — tiny images scale up sharp instead of blurry.
• 📦 Compress to a target size — st2k compress <file> --max-size 1MB finds the best quality under your limit.
• 🧹 No more stuck blank thumbnails — a file that decodes to nothing now shows its normal icon.
• 🍎 Apple Live Photo (.livp) thumbnails — bringing the total to 313 formats.

Full changelog

Install

Download SageThumbs2K-Setup-0.4.9.exe below and run it.

ℹ️ The installer isn't code-signed, so Windows SmartScreen may show a one-time "unknown publisher" prompt — click More info → Run anyway.

SageThumbs 2K 0.4.8

What's new in 0.4.8

• Thumbnails now work on a clean Windows install. The shell extension no longer depends on the Visual C++ runtime, so it registers and shows thumbnails even on a fresh machine missing the VC++ redistributable — previously that produced no thumbnails and a cryptic "failed to register" error.
• More EPUB covers show up. Books that reference their cover through a wrapper page instead of the image directly — Standard Ebooks and many older EPUBs — now display the real cover.
• Very large comic archives thumbnail again. A CBZ or CB7 over 256 MB now shows its cover, read straight from the archive without loading the whole file into memory.
• Two more formats — GeoGebra worksheets (.ggb) and .phz comic archives, bringing the total to 312. A JPEG-2000 page inside a comic archive can now serve as the cover too (on the full install).
• DjVu hardening verified against the scanned documents that used to crash this class of extension.

Install

Download SageThumbs2K-Setup-0.4.8.exe below and run it. The installer is unsigned indie software, so Windows may show a SmartScreen prompt — click More info → Run anyway.

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⭐ If it's useful: star the repo · review it on SourceForge · like it on AlternativeTo

SageThumbs 2K 0.4.7

Stability release — fixes shell and preview-pane hangs.

Fixes

• Preview pane no longer hangs. Selecting an image in the file dialog / Explorer preview pane could freeze (sometimes needing prevhost.exe to be killed). The preview now decodes off the host thread, and an internal concurrency lock that could leak when a host was force-killed is now self-healing — so the hang can no longer accumulate until a reboot.
• Right-clicking an exotic file can no longer freeze Explorer. The classic context-menu preview now uses only fast in-process decoders (no ImageMagick/video/PDF/SVG on the shell thread).
• Video frame-grabs are time-bounded, so a stalling codec can't hang the thumbnail/preview.
• Context-menu actions (Convert, Resize, Rotate, etc.) now run in the background instead of blocking the Explorer window until they finish.

New

• Lazy update check. Opening Settings now does a quiet, once-a-day background check for a newer version and, if one exists, labels the "Check for updates" button accordingly — no nagging pop-ups, no checking more than once a day.

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Windows 11. Unsigned (SmartScreen may warn — "More info → Run anyway"). Free for personal use (PolyForm Noncommercial).