I’ve always been using GIMP for cropping images (for articles, books, etc.), and it works pretty well, but I never thought that you could do the same much quicker with the default image viewer of KDE, Gwenview. In KDE Plasma, I’ve always used Gwenview as an image viewer, but it’s much more:

Gwenview is a fast and easy to use image viewer by KDE, ideal for browsing and displaying a collection of images.

Features:

• Supports simple image manipulations: rotate, mirror, flip, and resize
• Supports basic file management actions such as copy, move, delete, and others
• …

In fact, you just open an image with Gwenview:

Press “Show Editing Tools” and then select “Crop” from the palette:

The box for cropping is ready to be resized:

When you’re done, just press ENTER:

and the image is ready to be saved!

With GIMP, the number of steps is much more significant.

Moreover, with Gwenview, once you cropped and saved the current image, you just press the right arrow to go to the next one. Much faster!