How to Keep Aspect Ratio of Images in CSS

If you ever wanted to resize an image disproportionately without losing aspect ratio in CSS — these two properties will help you out:

/* Center an image in itself without losing aspect ratio */
img {
    width: 300px;
    height: 300px;
    object-fit: none;
    object-position: 50% 50%;
    background: blue;
}

It uses object-fit with object-position. By default, object-fit takes the value of fill, which scales the image disproportionately if the container doesn't match the aspect ratio of the image. object-position on the other hand, sets the position of the image inside the container. To better understand how they work, take a look at object-fit taking up different values:

The original size of the images is 200x300, but they are set to 200x200 through CSS.

With object-fit set to none on every image, observe how object-position changes the position of the image inside itself:

The original size of the image is 100x100px, but they are set to 200x200 through CSS.

10 Best Practices for Quickly Improving Your CSSBuilding scalable and manageable stylesheetsCSS has its own nuances that can make or break your design. Here are 10 tips for CSS :  best practices that can help you bring out the best from your styles.Learn More

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Resources:

• The object-fit property in CSS
• The object-position property in CSS