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Free tool

Free website security check

See the security basics of any website in a few seconds: the secure connection, the protective settings browsers look for, cookies and outdated code. You get a score out of 100 and what to fix, in plain English.

A safe, outside-only check: we open the page like any visitor’s browser would. We don’t try to break in, look for hidden files or scan ports.

What the check looks at

  • The connection: HTTPS, the move from http:// and HSTS, which keeps browsers on HTTPS.
  • Protective settings (headers): Content Security Policy, clickjacking protection, X-Content-Type-Options, Referrer-Policy and Permissions-Policy.
  • Cookies: whether they’re limited to secure connections and your own site.
  • Code on the page: old versions of common libraries like jQuery, insecure http:// files, and software versions the site gives away.
  • The extras: a security.txt contact file and CAA records that limit who can issue your certificates.

This is a quick outside check, not a full security test. It won’t find weak passwords, unpatched plugins behind a login or problems on your office network.

From the team behind these tools

Want to know where AI could save your business hours every week?

Sierrix’s AI interviewer calls you for about 15 minutes and asks how your business really runs. You get a practical automation plan built on the tools you already use, with a specialty in Microsoft 365 and Copilot, reviewed by a person before it reaches you.