Test files › Images › png-alpha-gradient.png
Sample PNG file
256x256 PNG with a horizontal alpha ramp from fully transparent to fully opaque.
↓ Download png-alpha-gradient.png| Filename | png-alpha-gradient.png |
| Format | PNG |
| Size | 2.2 KB (2,229 bytes) |
| MIME type | image/png |
| SHA-256 | 8e81decafe428a492142b1b04d1a63a32133f18f3e6393753f872c7a01a32c1d |
What this file catchesThumbnailers that flatten alpha onto black instead of white, and format converters to JPEG that produce a black box where transparency was.
Download & verify
curl -fsSL -o "png-alpha-gradient.png" "https://files.hexaqa.com/image/png-alpha-gradient.png"
curl -fsSL "https://files.hexaqa.com/image/png-alpha-gradient.png" | sha256sum
# expect: 8e81decafe428a492142b1b04d1a63a32133f18f3e6393753f872c7a01a32c1d