Everybody says a picture is worth a thousand words, which is one of the reasons images are very important in the application. Images of the product are able to attract the customer to pick up, touch and inspect. They rely heavily on the images to understand the color, the quality, and the story of the product in front of users. Large images slow down your web pages which creates a less than optimal user experience because images take longer to load and users can’t wait. Optimizing images is the process of decreasing their file size, using either a plugin or script, which in turn speeds up the load time of the page.

Lossy vs Lossless Images Optimization-:

There are two methods commonly used for compression.

Lossy-: Images saved in a lossy format will look slightly different than the original image when we uncompressed. Always Keep in mind that this is only visible at a very close look to users. Lossy compression is good for the web because images use a small amount of memory, but can be sufficiently like the original image. You can use tools such as Adobe Photoshop, Affinity Photo, or other image editors to adjust the quality settings of an image.

Lossless -: Images saved in lossless format retain all the information needed to produce the original image, for this reason, these images carry a lot more data and in the return are a much large image size. You can perform a lossless compression on your desktop using tools such as Photoshop, FileOptimizer, or ImageOptim.

How to Optimize Your Images-:

Full optimization of images can be quite an art to perfect as there are such a wide variety of images you might be dealing with. Here are the most common ways to optimize your images for the web and increase performance. Reduce the white space around images – some developers use whitespace for padding which is a big no. Crop your images to remove any whitespace around the image and use CSS to provide padding. Use proper file formats. If you have icons, bullets or any graphics that don’t have too many colors use a format such as GIF and save the file with lower amounts of colors. If you have more detailed graphics then use JPG file format to save your images and reduce the quality. Save your images in the proper dimensions. If you are having to use HTML or CSS to resize your images, stop right there. Save the image in the desired size to reduce the file size according to need.

These tools provide a quick and easy way to reduce files size without losing any image quality.



Best Practices-:

There are some general best practices when it comes down to how to optimize images for the web:

  • Use vector images whenever possible alongside your PNGs and JPGs
  • Use a CDN to serve up your images fast to visitors across the globe
  • Remove unnecessary image data
  • Crop the white space and recreate it by using CSS to provide the padding
  • Use CSS3 effects as much as possible
  • Use PNG if you need high detail and high resolutions
  • Use JPG for general photos and screenshots
  • Remove any unneeded image metadata