Image optimizer helps you identify the best image sizes for optimized resolutions and loading speed. First, upload a csv file with URLs of the webpages you want to optimize. You can download the output csv to check the target sizes of the images. Then click "Resize Image" to proceed for Quanery Lite to help resize your images. Once the resizing is ready, click "Download Image" to download the resized images for your use. You can then upload the images back to your website to replace them with existing large image files.