PowerToys is Microsoft’s free utility collection for Windows, and two parts of it overlap with SageThumbs: its thumbnail providers, which add Explorer thumbnails for selected file types, and Peek, which previews a selected file with a keyboard shortcut. The comparison is therefore narrower than it first looks. SageThumbs is a single-purpose extension covering 162 image formats (224 extensions) in Explorer; PowerToys is a broad toolbox in which image thumbnails are one small feature among window managers, text tools, colour pickers and much more. Which you need depends on whether your problem is image-format breadth or a grab-bag of Windows conveniences.
Thumbnail coverage: selective vs encyclopaedic
PowerToys’ thumbnail providers exist for particular file types Microsoft chose to include — historically things like SVG and PDF and certain developer and 3D-related formats — rather than as a general image system. That selectivity cuts both ways: notably, SVG thumbnails are something classic SageThumbs does not provide at all, since SVG is absent from its official list, so for that specific format PowerToys offers what SageThumbs cannot. For the long classic list — PSD, XCF, PSP, DDS, TGA, most camera RAW, icons and cursors and dozens of legacy types — SageThumbs remains the broader tool by a wide margin, because breadth was its entire design goal.
- SageThumbs: 162 formats via GFL, image-focused, includes layered documents and RAW.
- PowerToys providers: a short, specific list of file types; check Microsoft’s current documentation for what your version includes.
- SVG: PowerToys yes, classic SageThumbs no.
- PSD, XCF, DDS, TGA: SageThumbs yes; not the focus of PowerToys providers.
Peek vs the folder itself
Peek is PowerToys’ on-demand preview: select a file, press the shortcut, see it large. That competes with QuickLook’s idea, not with thumbnails — the folder itself remains icons until you ask. If your workflow is inspecting individual files, Peek (or QuickLook) serves you and SageThumbs adds little; if your workflow is scanning libraries, thumbnails do the work and Peek is the occasional supplement. It is also fair to weigh the whole package: PowerToys brings many unrelated utilities in one Microsoft-maintained install, which some people prefer over several single-purpose tools, while others prefer that SageThumbs does exactly one thing and nothing else runs in the background.
| Factor | SageThumbs | PowerToys |
|---|---|---|
| Maker | Nikolay Raspopov (Cherubic Software) | Microsoft |
| Cost | Free, GPL v2 | Free, open source |
| Scope | Image thumbnails in Explorer | Many Windows utilities; thumbnails are one feature |
| Image format breadth | 162 formats via GFL | Selected file types via its providers |
| On-demand large preview | Small context-menu preview | Peek, via keyboard shortcut |
| Development | Last release 2017 | Actively developed |
The practical verdict
Install PowerToys if you want its utilities — many people do — and enjoy its thumbnail providers and Peek as part of the package. Install SageThumbs when your folders are full of design, texture, icon and RAW files that Explorer still shows as icons after PowerToys is installed, because that specific gap is what its 162-format list closes. Running both is normal and conflict-free in the usual case: their thumbnail coverage barely overlaps, and Peek answers a different question from folder thumbnails altogether.
Who each tool is really for
PowerToys is built for the Windows power user as a whole person: the same install that previews a file also renames batches of files, picks colours from the screen, keeps windows in zones and remaps keys. Judged as a suite, its value is the accumulation, and its thumbnail providers are a bonus that happens to cover a few types — SVG above all — that the classic extension lacks. SageThumbs is built for one person only: the one staring at a folder of design, texture or RAW files rendered as identical icons. Judged on that single task it is deeper by an order of magnitude, because depth was the entire brief. There is no contradiction in holding both views, nor in installing both tools: PowerToys for the suite and the SVG case, SageThumbs for the 162-format image list, Peek for inspecting whatever the folder scan surfaces. The mistake is only to expect either tool to do the other’s defining job.
One administrative note for work machines: both tools are free and neither phones home with your images — SageThumbs is a local shell extension under the GPL, and PowerToys is Microsoft’s own open-source project — so the decision can be made on fit rather than on procurement or privacy grounds.
If you are deciding for a whole household or a small studio rather than one machine, the calculus barely changes: both installs are free, both are quick, and the training burden of either is close to zero because both work inside the Explorer habits people already have. Install PowerToys where its suite will be used, SageThumbs where image folders dominate, and both where both are true — which, in practice, is most desks.
Frequently asked questions
Does PowerToys give PSD thumbnails?
PSD is not the focus of PowerToys’ selective thumbnail providers. For PSD and the other classic design formats, SageThumbs is the tool built for that job.
Which one handles SVG thumbnails?
PowerToys includes an SVG thumbnail provider; classic SageThumbs does not support SVG at all. For SVG specifically, PowerToys (or Windows tooling) is the answer.
Is PowerToys free like SageThumbs?
Yes. PowerToys is free and open source from Microsoft. SageThumbs is free under the GPL version 2.
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