This guide will show you step-by-step how to optimize images for web using both JPG and PNG formats. These files need to be clear, appropriately sized, and most importantly, small (as measured by kilobytes, not pixels). Saving a JPG for Web | Saving a PNG for WebĪs a graphic designer in mid-2016, most completed client projects wind up in digital format – graphics for the website, PDFs for download, social graphics, data sheets, brochures – rather than being sent to a printer. Skip To Section: Image File Types | How Big Should Your Image Be (KB) | How Big Should Your Image Be (WxH)