XnView is one of the most powerful photo viewers out there and probably the thing that attracts so many users is its freeware license.

But what’s more important is that XnView has so many features that it can easily challenge all the other tools in the same software category, regardless of their names and developer.

The interface is absolutely amazing, as it’s highly-customizable and impressively easy to use. Although it might be a bit overwhelming at the first glance, XnView lets you modify most of the things about its interface, including toolbars and buttons.

But the greatest thing does not reside in its interface, but under the hood.

Right click any picture you want and a whole new dimension opens its doors. The context menu allows you to start a batch conversion or renaming, send the photo by email, move or copy it to a certain folder, tag and rate it, set it as wallpaper and many, many other things.

What we found really impressive during our test was the quick conversion feature that lets you right click a photo and convert it into JPEG, TIFF, BMP and PNG formats in a second.

Of course, the batch processes work like a charm every time and it’s all about configuration this time. Just make the settings you want, pick the photos you want to work it and let the app do its magic.

All things considered, XnView is definitely one of the best tools of its kind, so if you’re looking for a freeware photo viewer and converter, this one should be one of your top picks.