SageThumbs 2K

LunarWerx·LunarWerxs.SageThumbs2K

Explorer thumbnails for 334 file types Windows can't read, plus a right-click image toolkit.

SageThumbs 2K is a modern, crash-isolated Windows 11 shell extension written in Rust that rebuilds the classic SageThumbs. It gives File Explorer thumbnails for 334 file types Windows can't preview on its own — camera RAW, HEIC/AVIF, Photoshop, DjVu, ebooks and comics, video frames, 3D-print files and a long tail of obscure formats — plus a right-click image toolkit (convert, resize, rotate, OCR, color picker, metadata strip, combine-to-PDF/CBZ) and a console/AI CLI. Free for personal use.

winget install --id LunarWerxs.SageThumbs2K --exact --source winget

Latest 2.5.0·August 27, 2026

Release Notes

What's changed

Added

  • A sign-in suggestion in Settings. If you have had SageThumbs a week and used it a few times, opening Settings may show a small card explaining that signing in with a Connections account carries your settings to your other machines. Dismissing it with "Not now" hides it for the rest of the day; from the fourth time you see it, a "Remind me in a month" button appears beside that, and you can pick it as often as you like. It never appears more than once a day, it only ever appears as Settings opens rather than interrupting what you are doing, closing the window counts the same as "Not now", and it is translated into all 36 languages SageThumbs speaks. Nothing about it changes how thumbnails work, and signing in remains entirely optional: every feature works exactly the same without an account.

Changed

  • You now choose what goes in the corner of a thumbnail, and setup asks you once. Only one thing fits in a thumbnail's bottom-right corner, and until now two separate tick boxes were quietly fighting over it: turning on the format badge without also finding the second box let Windows stamp the associated program's icon straight on top of it. Those two boxes are gone, replaced by a single choice on the Appearance page, and the installer asks it on a first install: Windows' file-type icon (what Explorer does on its own, and still the default), a SageThumbs format mark (PSD, JXL, AVIF... so you can tell formats apart at a glance), or nothing at all. Upgrading keeps whatever your old tick boxes were set to, and you can change it any time in Settings.

Fixed

  • More EPS files show a thumbnail. An EPS can carry a small built-in preview picture, and SageThumbs reads that rather than running the PostScript. It was being thrown away whenever the file had a blank line just after it, which some programs write and others don't, so whether your EPS files worked came down to which program made them. Note that an EPS saved with no preview at all still cannot be shown: drawing one would mean running the PostScript, which SageThumbs deliberately never does. If your EPS files show nothing, re-save them with the "include preview" option ticked.

  • Quick preview button tooltips no longer describe the state you just left. The light/dark button showed a moon while its tooltip still read "Light background", and it stayed wrong for as long as the window was open, because a tooltip's text was only ever set once when the window opened. Every tooltip now updates with the button it belongs to. Four more that had the same problem were fixed at the same time: the pin now offers to stop keeping the window on top once it is pinned, view-source offers the rendered view once you are looking at source, and mute and repeat both say what clicking them will actually do.

  • A plain-text email no longer writes itself into the preview's contents list. A line in a message starting with # was being read as a document heading, so it showed up huge and added itself to the outline down the side of the window. That line now shows as the text it is. Quoted reply text and numbered lists still render properly, because there they really are what they look like.

Installer type: inno

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Details

Homepage
https://github.com/LunarWerxs/SageThumbs-2k
License
PolyForm Noncommercial License 1.0.0
Publisher
LunarWerx
Support
https://github.com/LunarWerxs/SageThumbs-2k/issues
Copyright
Copyright (c) 2026 LunarWerx
Moniker
sagethumbs2k

Tags

converterexplorerheicimagerawshell-extensionthumbnails

Older versions (37)

2.4.1
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1.8.0
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1.0.1
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1.0.0
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0.10.0
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