The number of bytes used to encode each image pixel.Image optimization is really about improving two things: There are many factors that influence your PageRank, and images fall under the “Usability of web pages” category. This means that how fast or slow your page loads will dictate, to some extent, how well it ranks in search results. It’s also worth noting that site speed is a Google ranking factor. Consequently, it’s important to optimize the images you upload to your site. While there are multiple factors that can slow down your site, images and media files take up a hefty 63 percent of bandwidth on modern websites. In fact, pages that take five seconds or more to load see on average a 90 percent increase in the probability of a user bouncing (leaving after only viewing a single page). However, they can also be one of the main causes of slow page loading times.Ī slow website is a problem, because it can drive users away. Images are a valuable and important piece of any content strategy. Optimize Your WordPress Website with WP Engine Why You Should Be Optimizing Your Images for WordPress That’s an overview of two methods of saving your files for the web using Photoshop.5. When you are happy with how the preview looks, either click Cancel, or click Save to name and save your file. This is where you will use your eye combined with the details provided by the dialog box to make your decision.Ĥ. Compare the quality and size differences, and then click any optimized version to experiment with format and quality settings, continuing to judge size compared to quality. Under each preview window, you can see the file size, the quality and how long the image would take to load on a specific modem speed.ģ. Photoshop automatically renders three alternatives-a high–, medium-, and low-quality JPEG preview, or three GIF options, or one PNG option. The upper left preview shows the original image. On the Preset drop-down menu, choose the file format you’re interested in. In the Save For Web and Devices dialog box, click the 4-Up tab. Again with an image open in Photoshop, choose File > Save For Web And Devices (Note: On older versions of Photoshop the command is File > Save For Web).Ģ. You use the Save For Web And Devices dialog box to compare the original image to one or more compressed alternatives, adjusting settings as you compare.ġ. Photoshop offers a range of controls for compressing image file size while optimizing the on-screen quality. If this information is not required, then choosing Save For Web is a better option.
Using this method when saving photos, means that the EXIF metadata is saved with the image, so it is most useful for photographers who may want to include this info on a photo blog, website or email. This is a very big saving on file size, while still maintaining reasonably good quality. In this case, by setting the quality to 8, the file size goes from 165.8K to 84.5K. Click on the Preview check box so that you can see how changing the quality will affect the image. So we need to make a compromise between file size and quality. The higher the quality, the higher the file size. These attributes are directly related to each other. Click Save and the JPEG Options dialog box opens.įrom here you can change the quality and file size of the file. Choose File > Save As and on the dialog box, choose JPEG as the file format and type in a name for your new file. I’ve resized mine to 900 pixels wide in preparation for my photo blog.Ģ. In this example, I want to save my photograph as a JPEG.ġ. Save As allows you to save an image file in many different formats. To show you the difference, I’m going to save the same image file using both commands. If you’re new to Photoshop, you may not be aware that you can save files as JPEGs, GIFs and PNGs using the “ Save For Web” command as opposed to just using the “Save As” command under the File menu. It is available as PNG-8 and PNG-24, with PNG-24 being the higher quality and higher file size of the two. PNG format is a little like the best of both JPEG and GIF. It uses a palette of 256 colors to represent the image and supports background transparency. The GIF format is most effective at compressing solid-color images and images with blocks of repetitive color, such as line art, logos, and illustrations with type. It can represent images using millions of colors. The JPEG format is designed to preserve the variations of continuous-tone images such as photographs. JPEG and GIF are the two most common formats used on the web, with the PNG format catching up. One vital aspect of a successful web site is its ability to load quickly. Broadband may be allowing us to use larger images online, but it’s still important to remember the visitors who aren’t on broadband and optimize all images on a web site. The Save For Web command in Photoshop allows you to optimize your images for use on the web.
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