Cannot reach Cloudflare-fronted sites. This tool runs on Cloudflare Workers, which blocks connections back into its own network. Sites hosted on Cloudflare (including example.com) will report as unreachable rather than as closed. This is a platform limitation, not a problem with your site.
Only checks HTTP and HTTPS URLs.
Icon dimension parsing depends on correct Content-Type headers. Magic-byte sniffing is attempted as fallback, but some misconfigured servers may still return no dimensions.
No data is stored. Every check is stateless — results disappear when you leave this page.