Free network, DNS, email & security tools - Rocketeers

 Free tools

Everything you need to inspect a domain
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A growing toolkit for developers and agencies. Look up DNS, audit email deliverability, measure performance, scan for security headers and validate your SEO setup — all free, no sign-up.

 DNS & Email
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[MX lookup ](http://rocketee.rs/index.php/mx) [DNS lookup ](http://rocketee.rs/index.php/dns) [DMARC checker ](http://rocketee.rs/index.php/dmarc) [DKIM checker ](http://rocketee.rs/index.php/dkim) [SPF checker ](http://rocketee.rs/index.php/spf) [CAA checker ](http://rocketee.rs/index.php/caa) [MTA-STS checker ](http://rocketee.rs/index.php/mta-sts) [Blacklist checker ](http://rocketee.rs/index.php/blacklist) [Deliverability scan ](http://rocketee.rs/index.php/deliverability) [WHOIS lookup ](http://rocketee.rs/index.php/whois)

 Performance
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[HTTP/1, 2 & 3 checker ](http://rocketee.rs/index.php/http-version) [HTTP header checker ](http://rocketee.rs/index.php/http-headers) [TTFB checker ](http://rocketee.rs/index.php/ttfb) [Port & ping check ](http://rocketee.rs/index.php/network) [What is my IP? ](http://rocketee.rs/index.php/ip) [What is my user agent? ](http://rocketee.rs/index.php/ua)

 Security
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[HSTS checker ](http://rocketee.rs/index.php/hsts) [SSL checker ](http://rocketee.rs/index.php/ssl) [Security headers scanner ](http://rocketee.rs/index.php/security-headers)

 SEO
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[AI website scan ](http://rocketee.rs/index.php/ai) [Indexability checker ](http://rocketee.rs/index.php/index) [robots.txt Tester ](http://rocketee.rs/index.php/robots-txt-tester) [Sitemap validator ](http://rocketee.rs/index.php/sitemap-validator) [OG image preview ](http://rocketee.rs/index.php/og-preview)