Most tools execute directly in your browser. No data is sent to any server unless you explicitly run a server-side check.
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100% Private & Secure
We never store your queries, IPs, or results. Everything is processed in real-time and discarded immediately.
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Completely Free Forever
No hidden limits, no premium tiers, no login walls. All 16 tools are and will always remain free to use.
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Built for Shared Hosting
Works perfectly on cPanel, Plesk, and any standard PHP hosting. No special permissions or paid APIs required.
EXPLORE THE TOOLKIT
All Diagnostic Tools
HAVE QUESTIONS?
Frequently Asked Questions
Everything you need to know about our free web diagnostic tools.
A WHOIS lookup tool retrieves important domain registration information such as the domain owner, registrar, creation date, expiration date, and name servers. It is commonly used by developers, security researchers, and businesses to verify domain ownership, check expiration dates, and investigate potential phishing or trademark issues.
You can use our free SSL Analyzer tool to instantly check your SSL/TLS certificate. It shows the issuer, validity period, remaining days until expiration, Subject Alternative Names (SANs), and whether the certificate is trusted. This helps prevent security warnings and downtime caused by expired certificates.
Our DNS Lookup tool displays all DNS records for a domain, including A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records. This is useful for troubleshooting email delivery issues, verifying DNS propagation, configuring services, and detecting misconfigurations.
Scanning open ports with our Port Scanner helps you identify which services are publicly exposed. Unexpected open ports (such as database ports or remote access services) can indicate security risks or misconfigurations. Regular port scanning is an important part of server hardening and security audits.
Use our Blacklist Checker to see if your IP address appears on major DNS blacklists such as Spamhaus, SpamCop, Barracuda, and others. Being listed on these blacklists can cause email delivery problems and damage your domain’s reputation.
Subdomain enumeration helps discover hidden or forgotten subdomains of a domain. Our Subdomain Finder uses a smart wordlist to check for common subdomains. This is valuable during security assessments, infrastructure mapping, and when taking over old projects.
Yes. Webtools.fuby.net is designed with privacy in mind. Most tools run directly in your browser, and server-side checks do not store any personal data or query history. We never log your IP addresses or results.
No. All 16 diagnostic tools are completely free and require no registration or login. You can start using them immediately without creating an account.
