Free website checker

Enter a web address to test its security settings, email authentication, search basics and mobile speed. Most results appear within a few seconds. Google's speed test runs on Google's own servers and adds up to 40 seconds.

What it checks

What the checker looks at

Security and HTTPS

HTTPS and redirect. The site loads securely, and http:// addresses forward to https://.
Certificate. Trusted, matching the domain, and how many days until it expires.
TLS version. TLS 1.2 or 1.3; older versions are refused by current browsers.
Security headers. HSTS, content type, framing, referrer and content security policies.

Email authentication

MX records. Which servers receive mail for the domain.
SPF. One record that lists the servers allowed to send as you.
DKIM. A signing key under the 20 most common selector names.
DMARC. A policy telling receivers what to do with mail that fails the checks.

Search basics

Title and description. Present, and a length that fits in search results.
Headings and language. One H1, and the page language declared.
Mobile viewport. Phones get the mobile layout, which Google uses for ranking.
Canonical and indexing. No accidental noindex, and one preferred address per page.
robots.txt and sitemap. Crawlers are let in and can find every page.
Sharing preview. Open Graph title and image for links shared on social apps.

Speed

Server response. Time to the first byte, measured from our server.
Compression. Gzip or Brotli on the HTML.
Mobile speed score. Google Lighthouse on a simulated mid-range phone.
Core Web Vitals. Largest Contentful Paint, layout shift and main-thread blocking.

How to read the results

Each check passes, warns or fails. A failure is something visitors, search engines or email providers already notice, such as a browser warning or mail landing in spam. A warning is worth fixing but rarely urgent.

The score at the top is the share of checks passed, with warnings counted as half. It gives you a quick comparison between sites and between before and after a fix.

Getting the fix plan

Every problem the checker finds has a fix plan: the steps to take, in order of importance, with a rough time estimate for each. Leave your email address to see it. An engineer may write to you once about your results; we do not add you to a mailing list.

FAQ

Frequently asked questions

Is the website checker free?

Yes. The checks and the score are free and need no account. To see the step-by-step fix plan, you leave an email address so an engineer can follow up once if you want help.

Does the check change anything on my website?

No. It loads your home page, robots.txt and sitemap the way a browser or a search engine would, and reads public DNS records. Nothing is submitted, logged in to or changed.

Can I check a site that is not mine?

Yes, any public website works, which makes it useful for comparing yourself with a competitor. The email checks read public DNS records, so they work for any domain.

Why does my score differ from other tools?

Every tool weighs things differently. This one gives each check equal weight, so it shows how many basics are in place more than how any single metric performs. Google's speed score is shown separately for that reason.

What do you do with the address I enter?

We store the result so a repeat check within 30 minutes is instant, and so an engineer can see it if you ask for the fix plan. Results are never published.

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