Star Ratings in CSS and HTML

June 20, 2017

Looking to add star ratings to your web articles without image sprites? Here’s a sample CSS snippet that uses Data URIs to insert images as seen on the Chrome website.

<style type="text/css">
  .star {
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAKCAQAAADI+WwIAAAABGdBTUEAALGPC/xhBQAAAAFzUkdCAK7OHOkAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAAJiS0dEAP+Hj8y/AAAACXBIWXMAAAsTAAALEwEAmpwYAAAACXZwQWcAAAALAAAACgCF+qVAAAAAhUlEQVQI103NMQqCABgF4C+Fxg7QHDQ0JkFnaKqlKJBu4Np9hEDoBq2doCYP0B4UBKLYUKZvex+P/+9N/dJ3FXl9S9CopbF9U1pOkAgb3irVanOMlGqldeBoo9CmspMFOFmp/hzLmtuXzvrWvpwJFVJvLLqci8Qmzl8OhzBwcMdD6ilXfwAd9B9f78yTCQAAAABJRU5ErkJggg==);
  }

  .unstar {
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAKCAQAAADI+WwIAAAABGdBTUEAALGPC/xhBQAAAAFzUkdCAK7OHOkAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAAJiS0dEAP+Hj8y/AAAACXBIWXMAAAsTAAALEwEAmpwYAAAACXZwQWcAAAALAAAACgCF+qVAAAAAo0lEQVQI1z2NMQrCQBRE32YxGFDwBGJnYZkll0ilpDISLO28k4lFwN7CTsTKSisbK8ELCJFI/BZJdn41j/kzSqiVuZ3r1yzeAAanoajpcOwsW2dxf+0yWGe6CaVzNmgY4VHyQKAiVsIlUlvc9otK4lXugNnJjKqlkpi86X6exIZfNztZBGhKUgr4hBZ3A3UX4ye/CYdeWHch7MOzJ9R3jFLt8we7izGyoi32iQAAAABJRU5ErkJggg==);
  }

  .half-star {
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAKCAQAAADI+WwIAAAAAmJLR0QA/4ePzL8AAAAJcEhZcwAACxIAAAsSAdLdfvwAAAAJdnBBZwAAAAsAAAAKAIX6pUAAAACTSURBVAjXTY0xCsJAEEVfdiEgpPAWFpYTvMRWSioDwdIuh7GydbEIeAM7sU1lo42tR1CEdSzMJk4178H/H7qTVK4+A0URTNTMmZhVhEHXMK69/UEiS3Z0sOGOQqBMQAr2pABbgKDlujHQHlgQYpdWeRO7z/0Cj8swOcPyxvOEl/vXN/K2+kw5Zq4PipNR/E+Ft8IX7yMjsFUGo0cAAAAcdEVYdFNvZnR3YXJlAEFkb2JlIEZpcmV3b3JrcyBDUzVxteM2AAAAAElFTkSuQmCC);
  }

  .rating {
    float: left;
    width: 11px;
    height: 10px;
  }
</style>

CSS Star Ratings

That’s the basic CSS style. The .rating class properly aligns the individual stars while the .star and .unstar classes render the stars. For example, if you are display a rating of 3.5 out of 5 stars, the corresponding HTML code would be:

<span class="rating star"></span>
<span class="rating star"></span>
<span class="rating star"></span>
<span class="rating half-star"></span>
<span class="rating unstar"></span>

CSS

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Amit Agarwal

Google Developer Expert, Google Cloud Champion

Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India.

Amit has developed several popular Google add-ons including Mail Merge for Gmail and Document Studio. Read more on Lifehacker and YourStory