S Pangborn S Pangborn - 9 days ago 7
HTML Question

Embedding Base64 Images

Purely out of curiosity, what browsers does Base64 image embedding work in? What I'm referring to is this.

I realize it's not usually a good solution for most things, as it increases the page size quite a bit - I'm just curious.

Some examples:

HTML:

<img alt="Embedded Image" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIA..." />


CSS:

div.image {
width:100px;
height:100px;
background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIA...);
}

Answer

Data URIs are currently supported by the following web browsers:

  • Gecko-based, such as Firefox, SeaMonkey, XeroBank, Camino, Fennec and K-Meleon
  • Konqueror, via KDE's KIO slaves input/output system
  • Opera (including devices such as the Nintendo DSi or Wii)
  • WebKit-based, such as Safari (including on iOS), Android's browser, Epiphany and Midori (WebKit is a derivative of Konqueror's KHTML engine, but Mac OS X does not share the KIO architecture so the implementations are different), as well as Webkit/Chromium-based, such as Chrome
  • Trident
    • Internet Explorer 8: Microsoft has limited its support to certain "non-navigable" content for security reasons, including concerns that JavaScript embedded in a data URI may not be interpretable by script filters such as those used by web-based email clients. Data URIs must be smaller than 32 KiB in Version 8[3].
    • Data URIs are supported only for the following elements and/or attributes[4]:
      • object (images only)
      • img
      • input type=image
      • link
    • CSS declarations that accept a URL, such as background-image, background, list-style-type, list-style and similar.
    • Internet Explorer 9: Internet Explorer 9 does not have 32KiB limitation and allowed in broader elements.
    • TheWorld Browser: An IE shell browser which has a built-in support for Data URI scheme

http://en.wikipedia.org/wiki/Data_URI_scheme#Web_browser_support