Web Check - Complete Website Analysis

What is Web Check?

Web Check is a free all-in-one website analysis tool. Enter any URL and it runs a full battery of diagnostics in one pass — instead of jumping between a DNS lookup, an SSL checker, a headers inspector and a speed test, you get every result on a single page. It is built for developers, sysadmins, SEO specialists and site owners who want a fast, honest snapshot of how a website is configured and how it behaves from the outside.

All checks are performed server-side against the public-facing site, exactly as a visitor's browser or a search-engine crawler would see it. Nothing is stored: each analysis is run on demand and the results are yours to read and discard.

What Web Check inspects

• DNS & hosting — A/AAAA records, nameservers, the resolved IP and where it is hosted.
• SSL/TLS certificate — issuer, validity dates, days until expiry and whether the chain is trusted.
• HTTP response headers — status code, redirects, server software and security headers such as HSTS, CSP and X-Frame-Options.
• Performance — response time and page weight, so you can spot a slow or bloated page at a glance.
• SEO & social meta — title, meta description, canonical, Open Graph and Twitter Card tags.
• Mobile & accessibility signals — viewport configuration and other front-end basics.

What each finding means — and how to fix it

Most website checkers stop at reporting a problem. The point of a check is knowing what to do next. Here is how to read the results Web Check returns, and the specialised tool that helps you resolve each one — a detect → fix → re-check loop rather than a dead-end score.

• Certificate expiring or "not trusted". A certificate that expires in days, or a chain missing its intermediate, throws browser warnings that scare visitors away — and a missing intermediate often works on your machine but fails on a fresh phone. Confirm the exact expiry and chain with the SSL Certificate Checker, then reinstall the full chain.
• Missing security headers (HSTS, CSP, X-Frame-Options). Their absence leaves the site open to protocol downgrade, clickjacking and content-injection. The HTTP Headers Checker shows exactly which headers are present or missing so you can add the right directive on your server (Nginx, Apache, Cloudflare or IIS).
• Wrong status code or a long redirect chain. A page that answers 302 where you expect 200, or a chain like http → https → www → /page, wastes crawl budget and slows the first byte. Trace the full chain with the HTTP Headers Checker and collapse it to a single hop.
• DNS resolves to the wrong place (or not at all). After a migration the A/AAAA record or nameservers may still point at the old host for some resolvers. Check what each record actually returns with the DNS Lookup, and verify who the domain belongs to and when it expires with the WHOIS Lookup.
• Unexpected open ports. A database or admin port reachable from the internet is a real risk. Confirm exactly what is exposed with the Port Checker and close anything that shouldn't face the public.
• Weak SEO & social meta. A missing or duplicate title, an over-long description, a canonical pointing at the wrong URL, or absent Open Graph tags (which is why your link preview shows blank on social and chat apps). Run the page through the SEO Checker for a full on-page audit and copy-paste-ready tags.
• Slow or heavy page. A high response time or large page weight hurts both visitors and Core Web Vitals. Measure the specific page with the Website Speed Test and fix the largest render-blocking resource first.

That is the idea behind Web Check as a starting point: one scan surfaces the problems, and each problem has a dedicated tool a click away to diagnose it in depth and fix it — then you re-run the check to confirm it's clean.

Is this website safe? Reading the signals

Web Check is also a fast way to sanity-check an unfamiliar site before you trust it. None of these is proof on its own, but together they paint a picture: a valid HTTPS certificate from a recognised issuer, a domain with a real WHOIS history rather than one registered days ago, sensible security headers, and hosting/DNS that match what the site claims to be. A brand-new domain, a self-signed or mismatched certificate, and no security headers at all are reasons to be cautious. Because every value Web Check shows — certificate, DNS, headers, WHOIS — is public information the site itself serves, you are simply reading what any visitor's browser already receives.

How to use it

1. Paste a full domain or URL (for example https://example.com) into the box above.
2. Press Enter or click the analyse button.
3. Read the grouped results — each section can be scanned independently, and problems are highlighted so you know what to fix first.

Run it before a launch to catch a missing security header or an expiring certificate, after a migration to confirm DNS and redirects resolve correctly, or periodically to keep an eye on a site you maintain.

Frequently Asked Questions