Paste a URL and Recon Node runs around 40 checks on your site from the outside: TLS and certificate expiry, security headers, CSP, cookie flags, broken links, meta tags, soft 404s, exposed configuration files, SPF and DMARC, subdomain takeover, outdated JS libraries, scripts without integrity hashes, secrets in page source, CORS, CAA, DNSSEC. It also remembers your last scan. Run it again after fixing things and it shows what's new, what's still broken, and what went away.