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Free SEO tool
Check if a webpage has an HTML doctype declaration.
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Detects outdated HTML tags that should be replaced with modern alternatives.
Get the HTML language attribute from a webpage.
Check if a webpage declares its character encoding.
Popular tools
Get approximate IP details.
Get & verify the meta tags of any website.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Check if images on a webpage have the lazy loading attribute enabled for performance optimization.
Website status checker.
Take an IP and try to look for the domain/host associated with it.