ShortPixel’s Resize Images feature can reduce your hosting storage by changing the sizes of your uploaded pictures. Each time you add an image WordPress automatically generates a number of thumbnails which are deployed on your webpages. Your original pictures are rarely shown to your visitors, but they take a lot of your hosting space.
Here is how our Resize Image function works.
There are two resize options in our plugin settings menu. Keep in mind that the original aspect ratio is preserved in both cases.
Resize images – Cover
The first resize option is the most popular. It takes the small side of an image and it reduces it to make it equal or greater than the value set by user.
For example, if you set the resize dimensions at 1000×1200, an image of 2000x3000px will be resized to 1000x1500px while an image of 3000x2000px will be resized to 1800x1200px.
Important: the resized image should not be smaller than your largest thumbnail. You could actually enter a smaller value, but then you won’t be able to regenerate your largest thumbnail afterwards if you need to.
Resize images – Contain
The second resize option takes the big side of the image and it makes it equal to the value you set. Sizes will be smaller or equal to the corresponding value.
For example, if you set the resize dimensions at 1000×1200, an image of 2000x3000px will be resized to 800x1200px while an image of 3000x2000px will be resized to 1000x667px.
If you are not sure which option is better for your use case, please test it on a few images from your WordPress Media Library. Make sure to keep the Image backup option active, in case you are not pleased with the resize results.