ICO directory inspector
Favicon ICO viewer
See what is really inside favicon.ico: every embedded dimension, PNG or BMP payload, bit depth, file size, and whether the essential 16px, 32px, and 48px layers exist.
Open a favicon.ico file
The file is parsed locally. It is never uploaded.
Why ICO layers matter
ICO is a container, not a renamed image. A browser or desktop shell can choose the closest embedded layer instead of shrinking one large bitmap. PNG-compressed layers are common for larger artwork; BMP/DIB layers remain useful for older clients.