How to Reduce JPEG Image file size on PC With Microsoft Paint · In Microsoft Paint, go to Image, scroll down, and then use the resize button to create your desired image dimensions. Select your preferred image dimensions, then set the resolution to the appropriate size by clicking on the Reduces Size Of JPEGs On The PC With Microsoft Paint July 30, 2023 — How will I improve file size of my images? · We know that not all images have high quality resolution. To reduce JPEG file size on PC: · Download Foresaw online photo compressor. · Go to the folder that you want to save the file to (we suggest the default folder. · Open the file. You will see a progress bar that indicates how far you have to go in order to save the file. The more time the better.