What\'s the Smallest Data URI for a 1x1 Transparent Image?

Determining the Smallest Possible Data URI Image for a Transparent Image

Question:

Seeking to minimize HTTP requests, you aim to utilize a transparent 1x1 image with a background image. What is the most concise data URI string that can generate a transparent image?

Answer:

Transparent GIF (Slightly Longer but Stable - 78 bytes):

data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7

Unstable Transparent GIF (Shorter - 74 bytes):

data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==

Caution:

Despite being shorter, the unstable GIF may cause CSS glitches and prevent background images from displaying correctly in some browsers. Therefore, it is recommended to use the slightly longer but more stable version.

Additional Tip:

Never Omit the "image/gif" Type:

Contrary to some suggestions, omitting the "image/gif" type will cause errors in multiple browsers.

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