Free webmaster tools
Everything you need to move a website without losing traffic, email, or data — type a URL, domain, or IP into any tool below to run it instantly. Free, no signup.
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Popular tools
Website Preview
Create a temporary preview URL to view a site on a new server before DNS changes.
Server Diff
Compare old vs. new server (status, headers, redirects, body hash) before a cutover.
DNS Propagation
Compare a domain's DNS across 45 public resolvers around the world to check propagation.
DNS Lookup
Query any record type — A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, CAA, PTR — for a domain.
Cache Checker
Grade HTTP cache + CDN headers: freshness, validators, edge HIT/MISS, compression.
Security Headers
Grade HSTS, CSP, X-Frame-Options, nosniff, Referrer-Policy, and Permissions-Policy.
SSL Certificate Checker
Read a TLS certificate: issuer, expiry, SAN, hostname match, and chain completeness.
Redirect Checker
Trace the full 301/302 chain and flag loops, long chains, and HTTPS→HTTP downgrades.
Broken Link Checker
Extract a page's links and test each for 404s, server errors, and redirects.
Meta Tag Inspector
Audit on-page SEO: title, meta description, canonical, meta robots, viewport, and H1.
Hreflang Validator
Audit hreflang annotations against Google's rules: self-reference, x-default, ISO codes.
Social Share Preview
See how a URL looks shared on Facebook, LinkedIn, and X from its Open Graph / Twitter tags.
Email DNS Checker
Check MX, SPF, and DMARC (and DKIM with a selector), validate the policies, flag gaps.
Blacklist & Reverse DNS
Look up an IP/domain's reverse DNS (PTR) and check it against major email blacklists.
Nameserver Checker
List a domain's NS records, verify they resolve, read the SOA, flag single-network risk.
Who Is Hosting This Site?
Resolve a domain to its hosting provider / network (ASN), country, and reverse DNS.
WHOIS Lookup
Registrar, creation and expiry dates, status, and nameservers for a domain or IP.
Robots.txt Tester
Check whether a URL is allowed or blocked for a crawler by robots.txt, plus sitemaps.
Diagnostics
Run DNS, WHOIS, TLS, and HTTP header checks on any domain from one place.
Hosts File Generator
Generate hosts-file entries for any IP/domain pair, single or bulk, for local testing.
Migration Checklist Generator
Answer a few questions and get a personalized, step-by-step hosting migration checklist.
Cache-Control Generator
Pick a resource type and freshness, get the Cache-Control header plus nginx and Apache config.
301 Redirect Generator
Turn an old→new URL map into ready-to-paste .htaccess and nginx 301 rules.
SPF & DMARC Generator
Build valid v=spf1 and v=DMARC1 TXT records from your senders and policy choices.
Guides & reference
Website migration checklist guide
The full, SEO-safe migration walkthrough.
DNS & hosting glossary
A/AAAA/CNAME/MX, hreflang, canonical, and more in plain English.
Browser & panel extensions
Preview links from Chrome, Firefox, cPanel, and DirectAdmin.
Blog
Migration, DNS, and hosting how-tos.
Preview on your host
Host-specific steps to preview your site before DNS changes.