Web & SEO & Dev Tools Tools

DNS, WHOIS, SSL, SPF/DMARC, blacklist & screenshot

Check DNS propagation across 30+ global resolvers

Query DNS records from multiple resolvers simultaneously

Full DNS diagnostic check

History of DNS record changes

Domain registration & registrar info

IP geolocation, ASN, ISP

Bulk nameserver check

DS, DNSKEY, RRSIG chain validation

SSL certificate & chain check

SSL check for multiple domains at once

Decode a CSR — subject, key, SAN

SPF / DKIM / DMARC records

Email headers & hop delays

Check against 20+ blacklists

Meta tags & SEO analysis

Google PageSpeed Insights

Redirect chain with latency per hop

robots.txt & llms.txt analysis

Scan a file with 70+ antivirus engines

HSTS, CSP, X-Frame-Options and other HTTP security headers

What a website is built with (Wappalyzer-style)

Format, syntax highlight & validate JSON

Base64 encode/decode, URL encode/decode

Network range, broadcast & usable IPs from CIDR

Ping, download, upload

Check if a site or server is online

DNS & SSL monitoring with email alerts