I need an image viewer capable of showing thumbs for folders, but showing only the thumb of the first image in each folder, not thumbs with a mix of images in those folders, like the Windows Explorer is showing. If possible, would be awesome if the viewer would allow me to set for each folder which image in that folder would be shown as the thumb of that folder (instead of the first image in the folder) and to save that configuration in a configuration file, so I can use it on another computer too. Would be very nice if the viewer would allow em to set the size of the thumbs (all thumbs the same size, of course).

If possible, I am looking for a free viewer capable of doing this.

I remember I've found such a viewer some years ago but I can't remember it's name now. I think it was a viewer that was available for Linux and MacOS too.

  • 1
    I seem to remember that either IrfanView or xnView can do what you specify your first sentence and can also set the size. I'm not sure which one, or if I am remembering correctly. Both are free if you want to try. Feb 17, 2016 at 4:51
  • 2
    For which Operating System? Feb 17, 2016 at 5:32
  • 1
    irfanview is windows only, and xnviewmp is multiplatform. i havent played around with xnviewmp for a long time, i dont think you can set a custom image as the thumbnail. you can set thumbnail sizes under the browser though. most free image browsers offer a portable mode
    – FONZ
    Feb 17, 2016 at 9:53
  • to my knowledge, what you are after isn't available. however, i have a semi-complete application i made with WinAutomation that does just this. you select the parent folder, and then it iterates through each image folder. you pick the image you want as the folder icon, and it then generates the folder icon and configuration file. do you know how to make the config file? if not am happy to share
    – faustus
    Feb 17, 2016 at 10:13
  • @faustus: thanks for the offer but I'm way too slow in programming. Maybe if you save it on github someone will pick it up and add that feature?
    – Joe Jobs
    Feb 18, 2016 at 2:44

1 Answer 1


I just tested XnViewMP and it has this feature. Instead of showing the folder thumbnails as a four image thumbnail, it can show just the thumb of the first image in the folder.

I've found a workaround for setting which image in the folder to be shown as the thumb - I can make a copy of the desired image so it will be the first image in that folder, and then it will be shown as the thumb for that folder.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.