What is R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAAL…?
1×1 transparent GIF
R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
| Decoded type | GIF image (image/gif) |
|---|---|
| 解码后大小 | 42 B |
| Base64 length | 56 characters |
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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