XnView Software

Sure, whatever makes it faster and easier to use. Do it!

There is a quality difference even for lossless compression?
Of course. You can try any picture.
Here's an example random instagram pic https://ibb.co/6BVGhtR
A 2mb file, jpg 100% quality, uncompressed. Let's get it down to about 100kb.
I have used faststone for the reference jp2 & image ...

cday wrote: Sat Jan 19, 2019 7:52 am Have you experimented with the quality settings available in File > Format settings... > Write tab ?

It's the same settings that you find in the "export" dialogue, so yes.

As I examine the program further the number of issues worth reporting grows.
Although nobody uses jpg2000 it's still worth noting that JPEG2000 conversion in xnview produces large files of bad quality - compared to other programs. Making the feature useless. The quality difference is so great that ...

Yes, I just noticed that the bug does not occur in all cases. I have updated the post.

It does not create a file.

Edit: Turns out it actually works but only if the save folder does NOT contain non-ASCII characters.

"Category" seems to be what tag is on instagram. There is also a different "tag" feature in xnview but I'm not sure what it does.
Anyway, the image browser seems to be missing an important filter - the category filter.
There is a special panel for categories, but it shows all tagged images no ...

suggestions:
Keep program running (in windows tray) after you close the window.
Opening images from within the xnview browser is fast, almost instantaneous which is great. Opening images from windows explorer is slow in comparison but it is faster when a xnview browser window is already open. So ...