What is R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAAL…?

1×1 transparent GIF

R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Decoded typeGIF image (image/gif)
Çözülmüş boyut42 B
Base64 length56 characters
Decoded 1×1 transparent GIF
47 49 46 38 39 61 01 00 01 00 80 00 00 00 00 00
FF FF FF 21 F9 04 01 00 00 00 00 2C 00 00 00 00
01 00 01 00 00 02 01 44 00 3B

Explanation

This 56-character string is probably the most copied Base64 value on the internet. Decoded, it is a 42-byte GIF image that is one pixel wide, one pixel high and fully transparent.

It is used as a spacer or placeholder in HTML e-mails and lazy-loading scripts (<img src="data:image/gif;base64,R0lGOD…">), and as a tracking pixel returned by analytics servers.

The prefix R0lGOD is the Base64 form of GIF8, so any string starting with it is a GIF image.

You can decode any similar value yourself with the Base64 decoder, or identify a file from its first characters with the Base64 to File converter.

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