Website check tools
Sixteen free checks for website owners and developers. Enter an address and in a few seconds see what is wrong with the site and how to fix it.
Site and availability
Full Website Check
SSL, uptime and speed in one run, with an overall site health score.
Check now →Uptime Check
Is the site up right now, what status code it returns and how fast it connects.
Check now →Speed Test
Server response time, page size, compression and tips on what to improve.
Check now →SSL Check
When your certificate expires, who issued it and whether browsers trust it.
Check now →Redirect Checker
The full redirect chain: status codes, loops, HTTPS loss, extra hops.
Check now →Mixed content
Resources loaded over http on an HTTPS page. The cause of a broken padlock.
Check now →Domain, DNS and hosting
DNS Check
All DNS records of a domain: A, MX, NS, TXT and more, in one query.
Check now →Domain Whois
When the domain was registered, when it expires and who the registrar is.
Check now →Who is hosting
Hosting provider, data center, the site's DNS and mail, CDN presence.
Check now →Email and reputation
Email Check
SPF, DKIM and DMARC: why emails from your domain end up in spam.
Check now →Blacklist Check
Is your website IP listed in DNSBL spam blacklists?
Check now →Security and SEO
Security Headers
Site protection grade from A+ to F: HSTS, CSP and other security headers.
Check now →CMS Detector
What the website is built with: WordPress, Joomla, Tilda or something else.
Check now →Open Graph & preview
How your link looks on Facebook and Telegram, and which meta tags are missing.
Check now →robots.txt & sitemap
Is the site blocked from Google, is a sitemap listed, is robots.txt valid.
Check now →