About ArcThumb
ArcThumb is a Windows Explorer extension that adds thumbnails and preview-pane images for archive files and ebooks. When a supported container includes images, it can use the first image as the file’s thumbnail and display a larger preview in Explorer’s preview pane. Supported containers include ZIP, 7Z, RAR, TAR, and comic-book variants such as CBZ, CB7, CBR, and CBT. Supported ebooks include EPUB, FB2, MOBI, AZW, and AZW3. Images inside can be decoded from JPEG, PNG, GIF, BMP, TIFF, ICO, and WebP, with optional JPEG XL support in custom builds. ArcThumb is useful for visually browsing image archives and ebooks without opening each file. A configuration interface lets users enable formats, set decoding limits, and register or unregister the extension. The evidence does not describe ebook text rendering beyond image previews.
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