What is iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAA…?
1×1 transparent PNG
iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==
| Decoded type | PNG image (image/png) |
|---|---|
| 解碼後大小 | 70 B |
| Base64 length | 96 characters |
89 50 4E 47 0D 0A 1A 0A 00 00 00 0D 49 48 44 52 00 00 00 01 00 00 00 01 08 06 00 00 00 1F 15 C4 89 00 00 00 0D 49 44 41 54 78 DA 63 64 60 F8 5F 0F 00 02 87 01 80 EB 47 BA 92 00 00 00 00 49 45 4E 44 AE 42 60 82
Explanation
Every PNG encoded to Base64 begins with iVBORw0KGgo, the encoded form of the 8-byte PNG signature 89 50 4E 47 0D 0A 1A 0A.
This particular value is a minimal 1×1 PNG. Developers use it as an image placeholder in unit tests, in CSS and in API mocks because it is a valid image that every library can open.
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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