Twelve formats supported
ZIP / CBZ / RAR / CBR / 7Z / CB7 / CBT / EPUB / FB2 / MOBI / AZW / AZW3 — archives and ebooks in one extension.
Windows shell extension
ArcThumbv0.7.3
ArcThumbv0.7.3Turn folders into a gallery.
ArcThumb shows cover thumbnails and preview-pane previews for ZIP, RAR, EPUB, MOBI and more — a tiny shell extension written in Rust.
What is ArcThumb?
ArcThumb is a small Windows shell extension that extracts cover images from archives (ZIP/RAR/7Z, plus CBZ/CBR comic archives) and ebooks (EPUB/FB2/MOBI/AZW) and renders them as Explorer thumbnails and preview-pane previews. Photo zips, asset packs and tech-book EPUBs — it turns your file manager into a visual gallery.
Features
Smart cover detection
Reads OPF manifests for EPUB, coverpage tags for FB2, and EXTH records for Kindle formats to pick the real cover.
Preview pane support
Implements IPreviewHandler so Alt+P shows a large cover in Explorer's preview pane.
No admin required
Per-user install by default. Uninstall any time, no leftovers.
Supported formats
Archives
- ZIP
- CBZ
- RAR
- CBR
- 7Z
- CB7
- CBT
Ebooks
- EPUB
- FB2
- MOBI
- AZW
- AZW3
Images (used as cover sources)
- JPEG
- PNG
- GIF
- BMP
- TIFF
- ICO
- WebP
AVIF, HEIC and SVG are not supported yet.
Enable only what you need
Open ArcThumb Configuration from the Start menu to toggle enabled extensions and image formats, choose the sort order, prefer specific cover filenames, turn the preview pane on or off, and pick the UI language.
Install in three steps
- 01
Download the .exe
Download ArcThumb-Setup.exe.
- 02
Run the installer
No admin rights needed — it installs into your user profile.
- 03
Pick your formats
Open ArcThumb Configuration from the Start menu, tick the formats you want, and hit Apply.
FAQ
Yes — WebP is supported, along with JPEG, PNG, GIF, BMP, TIFF and ICO. AVIF, HEIC and SVG are not supported yet.