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SageThumbs 2K, published by LunarWerx, is a Windows shell extension that adds thumbnail previews to File Explorer for 334 file types that Windows cannot render natively. Written in Rust and designed with crash-isolated architecture, it is a modern rebuild of the classic SageThumbs tool and targets Windows 11. The software falls within the file management and shell extension category, specifically addressing preview and image utility needs. Its supported format coverage spans camera RAW files, HEIC and AVIF images, Photoshop documents, DjVu files, ebooks and comics, video frames, 3D-printing files, and numerous other obscure formats that would otherwise display generic icons in Explorer. Beyond thumbnails, SageThumbs 2K includes a right-click image toolkit offering format conversion, resizing, rotation, optical character recognition, a color picker, metadata stripping, and the ability to combine images into PDF or CBZ archives. A console and AI command-line interface is also provided for scripted or automated workflows. The current version is 3.0.4, and the catalog lists 43 versions in total, indicating an extended release history with ongoing development. The software is free for personal use. Typical use cases include photographers browsing RAW captures, designers working with Photoshop files, readers managing ebook and comic libraries, engineers handling 3D-print file formats, and general users who need to preview or quickly manipulate images without opening dedicated applications. By integrating directly into the Windows shell, it delivers these capabilities at the File Explorer level, reducing the need to launch separate software for common preview and conversion tasks.
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