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HomeWeb Front-endCSS TutorialShould You Use Base64 Encoding for Images on Your Website?

Should You Use Base64 Encoding for Images on Your Website?

Impact of Encoding Images in Base64

Encoding images in Base64 transforms them into text strings representation, which has several implications regarding the size and practicality.

Effect on Image Size

Converting an image to Base64 typically increases its size by approximately 37%. This is because every three bytes of image data are encoded into a group of four characters in Base64, resulting in an increase of one-third.

Recommendation for Website Use

Using Base64-encoded images on a website is generally not recommended for several reasons:

  • Larger File Size: The increased size of Base64-encoded images can slow down page loading times, especially for images that are large or frequently displayed.
  • Loss of Image Quality: Base64-encoding process does not compress images, which means that images may appear pixelated or distorted when displayed on low-resolution devices.
  • Security Considerations: Base64-encoded images are not as secure as other image formats as the data is stored in plain text. This can be problematic if sensitive or confidential images are encoded.

For website use, it is generally preferable to use optimized image formats such as JPEG, PNG, or WebP, which provide superior compression, quality, and smaller file sizes without loss of quality.

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