Are your site's basic defense headers on?

The basic defenses your browser enforces are switched on by a single header line. We read from outside whether that line is missing.

Read-only external check · free for personal use · daily monitoring for business

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HSTS — forces HTTPS and blocks downgrade
CSP and X-Frame-Options — defend against injection and clickjacking
Server/version-exposing headers and Referrer-Policy signals

How it works

Enter one domain and we read only what anyone can see on the internet to gather the risks. We send no attack requests, separate hard evidence from heuristic signals, and write “not seen” for what we could not observe.

See other checks

PHP2Shell — is your site breached too?We check from outside for webshell upload and exposure signs, including CVE-2026-109618·109619 known as PHP2Shell. Free for personal use.Is your website safe right now?Enter a domain and we read-only check exposed files, certificates, server versions and signs of hacking. Free for personal use.Has my website been hacked?We check from outside for hidden spam links, crypto-mining scripts and hidden iframes on your homepage. Free for personal use.Is WordPress left open on an old version?We match your WordPress version against known-vulnerable releases and check exposed config, backups and directories.

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About Ultari NEO → · Ultari NEO · a second opinion alongside your antivirus