Nowadays WordPress is the best content management system (CMS) with lots of features and functionalities. The CMS enables you to design your website with little to no coding experience. You can install themes and add extra plugins according to your need and do whatever you want with your website.

Most of the WordPress themes are coming with responsive designs which means they are compatible with all the available screens. But sometimes, you may face responsive issues on your website. Sometimes, the images are not displayed properly or themes may be buggy. In that case, you need to set default responsive settings.

In the default setting sometimes you have to face image responsive issues. With all the screen sizes available for computer and mobile devices, it’s very important to understand the image optimization for a website.

If you know how responsive image in WordPress works and how to optimize images for your WordPress website, then it will help you a lot to deal with these types of issues.

What happens after uploading an image in WordPress admin

After adding an image to the WordPress library, the CMS will automatically create multiple dimensions for that particular image. We also can see 5 default sizes –

  • Thumbnail: Has a maximum height of 150px and a maximum width of 150px
  • Medium:Has a maximum height of 300px and a  maximum width of 300px
  • Medium-large:maximum height of 768px and a  maximum width of 768px
  • Large: This size has maximum height of 1024px and a maximum width of 1024px
  • Full size: The original image uploaded

So, we can see that by default, WordPress created 5 different sizes for our uploaded images in our server each time.

What Are Responsive Images?

Responsive images are those images that are automatically converted to the user’s device’s default screen sizes and device specifications. When the user has a small device like a mobile then the low regulations image will be sent to that device as well as a large regulation will be sent to the user who has a large HD monitor.

If you want to show responsive images for your users, you need to upload images in different sizes and formats. Then, you need some HTML, CSS, and JavaScript code to implement your images in different user’s screen parameters.

You can manually resize images in all formats or you can use any tools like Content Delivery Network (CDNs) to dynamically resize the images. Using tools will be the best option for you if you have lots of images for multiple websites.

Why do you need to use responsive images?

Using responsive images is very essential for any website for a better experience for the users. There are many reasons behind it such as-

User Experience

Responsive images on your websites lead to a better user experience. If your user spends time on your website that means they are having a good user experience. If they find it difficult to see the images or navigate your website, then they won’t spend their time on your website.

But if your website and images respond with their screen sizes, then it will be easier for them to browse your website. The more your users stay on your website, the more you will be benefited.

Increase Mobile Traffic

Statistics show that almost 60% of global web traffic is generated from mobile devices. So, you know the importance of mobile users. If you want to be benefited from Mobile users, your images and websites should be user-friendly for them.

Faster Load Time

The lesser data you use from your server, the faster your website will be. It is very as many users don’t want to waste their time loading your website.

Efficient Bandwidth use

If you have responsive images on your website, the exact data will serve your users. So it decreases bandwidth uses as you are not sending any extra file/s. You are sending a particular file for particular devices.

How Responsive Images Works In WordPress?

Earlier in this article, we mention WordPress automatically created five different sizes. You can modify all the sizes or can add your size manually. You need to use the image tag attributes srcset and sizes to control the image sizes in WordPress.

These attributes allow the browser to find and select what sizes are available and when to select that size.

The srcset attribute helps you to set image width. Then the browser selects the large image for the larger browser and the small one for the smaller browser. Using the size attribute, you can specify the size the image should scale to.


Responsive images are as important as responsive websites to make your user experience better. It helps the users to view everything on their devices without any bug or error. Responsive images also help you to make your website load time faster which defiantly increases your website’s overall performance.

You can see our other articles to learn How to enable WordPress debug mode

How to add a PDF viewer in WordPress

How to get a free SSL certificate for a WordPress website

We hope this article will help you. If you like this article please like our Facebook page. If you have any problem you can check our Website Maintenance services.