Base64 is a binary-to-text encoding scheme used to represent image data as an ASCII string. Instead of referencing an external file (e.g., icon.png ), developers embed the entire image data directly into their HTML or CSS. This technique is commonly used to "download" or embed small icons to reduce HTTP requests and improve initial page load performance. How to Convert and Use Base64 Icons
To "download" an icon in Base64 format, you typically convert an existing image file (SVG, PNG, ICO) into a long string of text using specialized tools. download icon base64