SiteLens
Everything a URL can tell you
Paste a URL and get a complete diagnostic report in seconds. SiteLens runs nine checks in parallel: HTTP response and redirect chain, security headers, cache and CDN behavior, DNS records, email security (SPF, DKIM, DMARC), WHOIS and domain expiry, TLS certificate health, server and IP intelligence, plus robots.txt and sitemap probes. It doesn't just list data — it interprets it. Security headers are graded A+ to F with copy-ready Nginx fixes for every issue found. Cache behavior is decoded, from cache-control directives to Cloudflare's cf-cache-status and origin-level caches like FastCGI. Expiring domains and certificates trigger warnings before they become outages. Every scanned URL lands in the sidebar with its grade badge. Click any entry to reopen its report, hit Re-scan to check it again, and switch between historical snapshots of the same site. Instant search keeps even a long history usable. Reports export to Markdown or JSON. Built for developers, sysadmins, and SEO specialists tired of juggling five different online checkers. Fully local: scans run from your Mac, your history never leaves it, no accounts, no telemetry.