So, you will need to optimize your image before you upload it, to make the image file smaller by adjusting the size without losing the image’s quality too much.
Free Image Optimizer
Online Image Optimizer lets you easily optimize your images in the format of GIF, JPG, and PNG, thus they will load as fast as possible on your site. Moreover, you can easily convert from one image type to another.
How to use?
Upload your image to the Online Image Optimizer or provide your image URL.
The optimizing process took a few seconds to generate and display the results.
Just choose which image you want and save it.
Visit: Online Image Optimizer