Instant diagnostics: check HTTP status, redirects, broken links, DNS, SSL certificates and response headers.
Enter any URL and get an instant SEO audit of its on-page factors.
Check the HTTP status code any URL returns, instantly.
Follow every redirect a URL takes and see the complete chain to the final destination.
Scan any page and detect every broken internal and external link before it damages your SEO.
Look up and diagnose every DNS record of any domain in seconds.
Inspect the SSL/TLS certificate of any domain and get a full security report.
View the full HTTP response headers of any URL to audit caching and security.
Generate a standards-compliant robots.txt file that tells search engines exactly what to crawl.
Generate a valid XML sitemap that helps Google and Bing discover and index every page of your site.
Generate a secure and fast Apache .htaccess file with redirects, caching, compression and security headers.
Create valid schema.org JSON-LD markup that helps search engines understand and richly display your content.
Instant diagnostics: check HTTP status, redirects, broken links, DNS, SSL certificates and response headers.
Explore the toolsA checker performs a live diagnosis of a URL or domain: HTTP status, redirects, links, DNS records, SSL certificates or response headers.
Results come from real-time requests to the target, so they reflect the server state at the moment of the check.
Yes. Any publicly reachable URL or domain can be analyzed. Authentication-protected pages cannot be fully checked.
Yes. Checks are performed anonymously for the single diagnosis and no data is stored or shared.
Explore the whole collection — no signup, 100% free & private.