Web & Network Tools
Free online web and network utilities: meta tag & Open Graph generator, HTTP status code reference, and an IP subnet (CIDR) calculator — all in your browser.
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SEO Checker
Check any URL’s meta tags, Open Graph and Twitter cards
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Meta Tag Generator
Generate SEO meta, Open Graph and Twitter tags
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HTTP Status Codes
Search and look up HTTP status codes
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IP Subnet Calculator
Calculate subnets, masks and ranges from CIDR
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DNS Checker
Look up A, AAAA, MX, TXT, NS and other DNS records
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Redirect Checker
Trace where a URL redirects and the full hop chain
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Sitemap Viewer
Fetch and browse the URLs in any XML sitemap
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Robots.txt Checker
Fetch, parse and test a site’s robots.txt rules