Free website health tools

Check any website's SSL certificate free: is it valid, trusted, and how many days until it expires. Instant results.

Check if a website is up right now and how fast it responds. Free, instant, no signup.

Scan a web page for broken links (404s and server errors) free. Instant results, no signup.

Test any page's Core Web Vitals (LCP, CLS, INP) free via Google PageSpeed. Instant performance score.

Check a page's on-page SEO basics free: title, meta description, H1, canonical, robots.txt and sitemap. Instant.

Check when a domain expires free via the registry (RDAP). Never let a domain lapse.

Scan a website's security posture free: HTTPS, security headers, TLS, cookie flags, exposed .env/.git files and blocklist status. Instant grade.

Run a real WCAG audit (axe-core) on any page and see violations by impact.

Check MX, SPF, DMARC and blacklist status — find out why client emails hit spam.

Resolve A, AAAA, MX, NS, TXT and CNAME records with quick health checks.

Grade HSTS, CSP, X-Frame-Options and more, and see what to add.

Inspect title, description, canonical and OG tags with a live social preview.

Check whether robots.txt blocks Google and whether the sitemap is valid.