Free website checker
Enter a domain and get one report on its SSL certificate, DNS, email security and server speed, with a grade from A to F and a plain-English fix for every problem.
How it works
Enter a domain
Type the domain or paste the address of the home page. Only public domain names are checked.
We run four checks at once
Our server connects to the site over HTTP and HTTPS, reads its certificate, looks up its DNS records and its SPF, DKIM and DMARC records.
Get a graded report
Each item is marked passed, needs attention or problem, with what it means and how to fix it. The score weights the items that matter most twice.
What the website checker looks at
Twenty-odd checks in four groups, each marked passed, needs attention or problem.
SSL and security
Certificate trusted and valid for the name, days until it expires, the http to https redirect, HSTS and the main security headers.
DNS
A and AAAA address records, name servers, the www name (address or CNAME) and CAA records that limit who may issue certificates.
Email security
MX mail servers, SPF (one record, valid, how many DNS lookups, ~all or -all), DKIM on common selectors and the DMARC policy.
Speed and basics
Server response time and total load time of the home page HTML from our server, page size, compression, HTTP/2, mobile viewport, title and description.
Website checker: questions and answers
Want this handled for you?
Register your domain with GlobalHostia and get DNS, SSL and email set up by our team, with support around the clock.