Free web tools
DNS, SSL, WHOIS, headers, TTFB, redirects, and more — fast utilities from UpFo on domainfo.net.
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Look up A, AAAA, CNAME, MX, NS, TXT, and SOA records for any hostname. Free DNS checker from UpFo — verify propagation and email/DNS setup.
Resolve approximate geolocation and network details for an IP address. Free IP intelligence helper from UpFo on domainfo.net.
Inspect TLS certificate details: issuer, SANs, validity dates, and chain info. Free SSL checker by UpFo.
Query public WHOIS data for a domain: registrar, dates, and status when available. Free WHOIS tool from UpFo.
Measure reachability and round-trip time to a host or port. Free ping utility from UpFo for quick connectivity checks.
Pull visible text from a page’s HTML source for audits and content checks. Free extractor by UpFo.
Measure time to first byte for a URL to spot slow origins or edge issues. Free TTFB tool by UpFo.
Estimate total transferred size for a page and its resources. Free page weight tool from UpFo.
Fetch and review title, description, Open Graph, and other meta tags. Free SEO meta inspector by UpFo.
Identify likely hosting / network provider details for a website. Free hosting lookup from UpFo.
Inspect response headers for a URL: cache, security, server, and content hints. Free header checker by UpFo.
Detect whether a site negotiates HTTP/2. Free protocol check from UpFo on domainfo.net.
See whether Google appears to have a cached copy of a URL. Free cache visibility helper from UpFo.
Follow 301/302 chains (up to 10 hops) and list each step. Free redirect tracer from UpFo.
Find hostnames associated with an IP when public data allows. Free reverse IP tool by UpFo.
Check if a website serves Brotli-compressed responses. Free compression checker by UpFo.