NexoraStack Tools
ICO Viewer
Inspect favicon.ico entries, dimensions, and previews.
Tool Interface
What is ICO?
ICO is a container format that can include multiple icon sizes and bit depths in one file.
- Browsers typically pick 16x16, 32x32, or 48x48 based on context.
- A single favicon.ico can include multiple PNG or BMP entries.
- For modern sites, keep PNG favicons too for explicit sizes.
No ICO file loaded yet.
Functional explanation
Parses ICO files and previews embedded icon entries by size.
- Audit legacy favicon.ico files.
- Confirm required sizes are present.
- Compare sharpness across icon entries before release.
How to use
Inspect favicon.ico internals to verify entry sizes, bit depth, and output quality. Use it before release to catch missing or degraded icon variants.
- Upload favicon.ico.
- Review entry list and metadata.
- Preview embedded icon variants.
- Confirm required sizes before release.
Example
Input
favicon.ico
Output
Detected entries: 16x16, 32x32, 48x48, 64x64
Missing small entries often affects browser tab quality.
Common mistakes
- Assuming one large icon is enough for all browsers.
- Ignoring size-specific blur in previews.
Output interpretation tips
- Include at least 16 and 32 for broad compatibility.
- Validate native-size previews, not only enlarged views.
FAQ
Why inspect ICO files before deployment?
It helps detect missing sizes or malformed entries early.
Can I preview each icon entry?
Yes. Available entries are listed with individual previews.