Thumbs Viewer

Thumbs Viewer is a tiny and portable app that gives users the possibility of extracting thumbnails from Thumb.db files.
It contains intuitive options for all users, regardless of previous experience.
Since installation is not a prerequisite, you can drop the executable file in any location on the hard disk and just click it to run.
There is also the alternative to save the tool to a USB flash disk or similar storage unit, in order to run it on any PC with minimum effort and no previous installers.
What's more, the Windows registry does not get updated with new keys, and files are not created on the HDD without your consent.
The user-friendly interface is made from a regular window with a plain and simple structure, where you can open Thumbs Database files using either the file browser or drag-and-drop support.
A list is populated with the name, entry size, sector index, and date of modification (in UTC) for each item that can be extracted. All or just selected files can be saved to the hard drive easily. Apart from the fact that items can be removed from the list, there are no other notable options provided by this app.
Thumbs Viewer has a good response time and runs on low CPU and RAM, so it does not hog system resources. We have not come across any kind of issues during our tests, since the app did not hang, crash or pop up error dialogs. All in all, Thumbs Viewer serves its purpose.