What is image optimization?
Image optimization is a process that decreases an image size without affecting its overall quality. Now you might think a decreasing size will also decrease quality. With the advancement of plugins and software, this process will compress your image with up to 80% accuracy.
Why we need this?
If you ever received a recommendation by your CMS provider, or by a speed test tool, that you should optimize your web page images. Then they are referring to reduce your image file size.
While there are tons of reasons that image optimization will help you grow, below mentioned are on the top:
(i) Faster webpage speed
(ii) Improve ranking on Google SERP
(iii) Higher conversion rate
(iv) Works with less storage
(v) Faster website backup
According to a recent survey by the HTTP Archive, an image covers up to 21% of a website’s weight. So you better start optimizing your images.
How to save images for Web performance?
Now comes the practical part. The key to the successful optimization of an image lies in the format in which it is being saved.
Three things that play a role for image optimization are:
(i) Image Dimensions
(iii) Image file format
By choosing the right combination of these factors will reduce your image file size.
1. Image Dimensions
Choose a proper dimension for your website (Height and Width) and stick to it. If you’ve used an 1100×480 pixel image on one article, then use the same dimension settings for your next article. A typical 1200×795 pixel image will take up to 100KB.
Just understand one thing here, higher compression = smaller file size. There are different tools and plugins available that can do this task. All you have to do is upload your image, click a few buttons and it’s all ready.
3. Image File Formats
To keep things simple, we recommend you to use JPEG for images that have lots of coloring scheme. PNG for still or single image, and GIF for an animated image. For those who don’t know these formats; PNG format is uncompressed, JPEG is compressed, and GIF uses a 256 color combination.
Image Compression Tools
Image optimization is an easy task. All it needs are a few clicks and you’re all ready to rock!
For this purpose, you can use computer software or plugins. We recommend you to use these tools to optimize your images before you upload them on your Job Board website.
This method will help you save bandwidth and guarantee faster-loading speed. Some famous Image optimization tools are:
(i) Adobe Photoshop
(iv) JPEG Mini
Some famous WordPress image optimization plugins:
(ii) Compress JPEG & PNG Images
(iii) ShortPixel Image Optimizer
(iv) Image Optimizer (EWWW)
(v) WP Smush
After you have done optimizing your images, it is always better to benchmark your web-page. For this, you can use online tools like Google PageSpeed Insights, GTMetrix, and Pingdom Tools. These tools will check each web page on your website, and provide results that you can look into.