Resizing a bunch of photos manually can be time-consuming, but there's no point in using a massive editor for that simple task. The best option is choosing an app like Resize My Photos.
With Resize My Photos you can resize as many images as you want simultaneously, selecting several files from different folders or even complete folders in your system. You can then choose the resizing method (either fitting height or width) and select the resized image quality level.
Resize My Photos also makes sure you don't overwrite the original files: the program can automatically rename resized photos with a customizable prefix or suffix, and save them into a different folder if that makes you feel better.
Resize My Photos is fast, efficient and simple, does what says on the tin and doesn't include any extra bells and whistles.
Resize My Photos helps you resize images in a much faster, efficient way.