Machine-Readable
Papa’s Best STL Thumbnails icon

Exactscan Pro 22.5.27 Apr 2026

A shell extension that adds preview thumbnails for STL files to Windows Explorer. Runs on Windows 7 or later.

Can also be used with Total Commander and FreeCommander.

Papa’s Best STL Thumbnails displaying a folder with random STLs from thingiverse

Download

Updated (changes, license).

Feel free to donate if you like my program!

64-bit Setup

recommended

32-bit Setup

for old systems

Video Guide

Michael from Teaching Tech made a video guide about the installation. He was so kind to allow me to embed it here! Thumbnail installation starts at 1:49.

Fast

Thumbnail generation is based on the fastest STL viewer available. Folders full of STL files are no problem, and most STL thumbnails are generated as fast as those of JPG photos.

Free

Compatible

Papa’s Best STL thumbnail viewer displays countless STL variations, even where other programs fail:

Exactscan Pro 22.5.27 Apr 2026

is a specific maintenance and feature update for the popular cross-platform document scanning software developed by ExactCODE . This version focuses on refining the "paperless office" experience by improving hardware compatibility and streamlining automated workflows. Core Features of ExactScan Pro

: While originally a Mac-centric application, the "Universal" version now supports Windows and Linux , bringing the same high-speed processing to those platforms. ExactScan Pro 22.5.27

: Automatically creates searchable PDF documents on-the-fly, supporting over 20 languages including English, German, French, and Japanese. is a specific maintenance and feature update for

: Allows users to split large batches of documents based on 1D barcodes and automatically name files using barcode content. supporting over 20 languages including English


Installation for all users

Papa’s Best STL Thumbnails installs for the current user by default. To install for all users on a system, open a command prompt or a PowerShell and run msiexec /i "Papas Best STL Thumbnails.msi" MSIINSTALLPERUSER="".

Repeat with every update!

is a specific maintenance and feature update for the popular cross-platform document scanning software developed by ExactCODE . This version focuses on refining the "paperless office" experience by improving hardware compatibility and streamlining automated workflows. Core Features of ExactScan Pro

: While originally a Mac-centric application, the "Universal" version now supports Windows and Linux , bringing the same high-speed processing to those platforms.

: Automatically creates searchable PDF documents on-the-fly, supporting over 20 languages including English, German, French, and Japanese.

: Allows users to split large batches of documents based on 1D barcodes and automatically name files using barcode content.


Dark background on some thumbnails

a folder with two thumbnails whose background is entirely black

Clear your Explorer thumbnail cache (see above) or copy the file to a different location.

This is a bug in Windows 10 that also affects other thumbnails – for example transparent PNG images here and here.

I can’t do anything in my program to work around it, I’m afraid. Please use the Windows 10 feedback function to report this to Microsoft. If enough users do it, they may eventually fix it. Windows 7 does not have this bug.


Something Missing?

Encountered a problem? Have a suggestion? Let me know: