How To Improve Image Quality In Css

Images are a crucial part of any website, as they help convey the overall message and enhance the visual appeal. However, sometimes, images may not appear as sharp and crisp as we would like them to be. In this blog post, we will explore some techniques to improve image quality using CSS.

1. Optimize Image File Size

Before diving into CSS techniques, it is important to ensure that the image files are optimized. Large file sizes can not only affect the image quality but also slow down the website’s performance. Use image compression tools like TinyPNG or Squoosh to reduce the file size without compromising the quality.

2. Use the Correct Image Format

Choose the appropriate image format for your content. For photographs and images with lots of colors, use JPEG. For simple graphics, icons, and logos, use PNG or SVG formats. SVGs are especially useful for scalable vector graphics, as they maintain their quality when resized.

3. Add a Background Size Property

When using an image as a background, make sure to specify the background-size property. This will ensure that the image scales properly according to the size of the container. The most commonly used values are cover and contain.


    .container {
        background-image: url('path/to/image.jpg');
        background-size: cover;

4. Disable Resampling

By default, browsers resample images when scaling them up or down. This can result in blurry or pixelated images. To disable resampling, add the following CSS rules:

    img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: -moz-crisp-edges;
        image-rendering: -o-crisp-edges;
        image-rendering: pixelated;

5. Use CSS Filters to Enhance Images

You can also use CSS filters to improve image quality by adjusting the brightness, contrast, and saturation. These filters are non-destructive and can be applied directly to the image element. For example:

    img {
        filter: brightness(1.1) contrast(1.3) saturate(1.1);

6. Use High-Quality Images for High-DPI Displays

High-DPI (dots per inch) displays, such as Retina screens, can make images appear blurry if they are not optimized. To provide high-quality images for high-DPI displays, use the srcset attribute in the img element:

    <img src="image.jpg" srcset="[email protected] 2x, [email protected] 3x" alt="Sample Image">


By following these tips, you can ensure that the images on your website look sharp and impressive. Optimizing images not only enhances their quality but also improves overall website performance, leading to a better user experience. Don’t forget to test the changes on various devices and screen resolutions to ensure that your images look great across different platforms.