JB Thumbnail Preloader Thumbnail Preloader
JB Thumbnail Preloader is a Windows app. You can buy your license right here on your phone; for the download itself, open this page on your Windows PC.

Technical

System requirements

The preloader is a Windows-only application. It sits deep inside the Windows preview architecture, which is why there is no macOS or Linux build.

AreaRequirement
Operating systemWindows 10 or Windows 11, 64-bit
Architecturex64. ARM devices are not supported at the moment.
Memory8 GB is enough, 16 GB is more comfortable with large archives
Free disk spaceThe installation itself is small. Space is needed for previews, depending on your file count.
PermissionsAdministrator rights to install, none during normal use.
InternetOnly for activation and updates. Preloading itself works offline.
DrivesInternal and external drives in every plan. Network drives and NAS in Studio.

What is not supported

  • macOS and Linux. Windows Explorer previews do not exist there.
  • Windows 7 and 8. The required interfaces behave differently.
  • Cloud folders in online-only mode. What is not stored locally cannot be prepared without downloading it.

How much space previews need

The requirement scales with the number of files, not their size. A 200 megabyte RAW produces the same small preview as a phone snapshot. The app shows the space used, cleans up on its own and can be capped.