My Tool Studio
10 tools · For developerseloper + SEO

Webmaster & Network

Network and webmaster tools using Node.js built-in modules, WHOIS, DNS lookup (A/AAAA/MX/TXT/NS/CNAME), SSL certificate checker, HTTP headers, IP info, URL shortener.

WHOIS Lookup

Look up domain WHOIS info

Webmaster
URL-first

DNS Lookup

Query DNS records (A/MX/TXT/NS)

Webmaster
URL-first

What Is My IP

See your public IP address

Webmaster

HTTP Headers Checker

Inspect HTTP response headers

Webmaster
URL-first

SSL Certificate Checker

Inspect SSL certificates

Webmaster
URL-first

Uptime Check

Check if a URL is up

Webmaster
URL-first

Domain to IP

Resolve a domain to IP

Webmaster
URL-first

Email Validator

Validate email syntax + MX

Webmaster

URL Shortener

Shorten URLs (Toolora-hosted)

Webmaster

URL Expander

Expand short URLs

Webmaster

Mobile Responsive Checker

Preview any site on real device viewports + user-agents

Webmaster
URL-first

Content Diff Checker

Compare two pages or texts and see exactly what changed

Webmaster
URL-first

About Webmaster & Network

The webmaster category is a diagnostics kit for anyone who runs a site or server. Look up a domain's registration with WHOIS Lookup, resolve records with DNS Lookup, and check a certificate with the SSL Certificate Checker. This domain whois lookup and ssl checker combination answers the two questions you ask most when a site acts up: who owns it and is its HTTPS valid. You'll also find the HTTP Headers Checker, Uptime Check, Domain to IP, Email Validator, and a URL Shortener and Expander. The Mobile Responsive Checker previews any URL on real device viewports.

Common questions

How do I run a WHOIS lookup and SSL check on the same domain?

Run the domain through WHOIS Lookup to see its registrar, creation date, and expiry, then paste it into the SSL Certificate Checker to read the issuer, validity dates, and fingerprint. Two quick checks tell you who holds the domain and whether its certificate is current.

Which webmaster tools help diagnose DNS and connectivity issues?

Start with DNS Lookup for A, MX, TXT, and NS records, then Domain to IP to confirm resolution and the HTTP Headers Checker to read the server response. The Uptime Check confirms the site is reachable, and What Is My IP shows your own address.

Can I shorten a link or expand a short URL in the webmaster category?

Yes. The URL Shortener creates a short link with click tracking, and the URL Expander reveals where a shortened link actually points before you click it. The Email Validator rounds things out by checking an address's syntax and MX records.