Site Health Check

One website, one instant report card

Most site owners never get a straight answer to a simple question, how healthy is my website, really? The information exists, but it is scattered across a dozen different tools that each test one thing and speak their own language. Site Health Check pulls it all into one place. You enter one address, and every graded Nitro Sites tool runs against it at once, live, with each result dropping onto the screen as a plain grade card the moment that check finishes.

The result is a single view of the whole picture. Seven subjects, each scored out of 100 with an A to F grade you can read in a second, plus one overall grade for the site. Green is good, amber needs attention, red needs work. No jargon on the card itself, just the grade and a one-line verdict. When you want the detail behind any grade, one click opens the full tool that produced it.

What it grades

• SEO. On-page search health, from indexability and titles to headings, content and structured data.
• Security. A passive scan of HTTPS, security headers, cookies, information disclosure and platform exposure.
• Speed. Real Core Web Vitals and a Lighthouse performance score, made readable.
• SSL / TLS. Whether the certificate is trusted, covers the host, is current, and uses modern TLS.
• AI visibility. Whether AI assistants can find, read and cite the site.
• Meta tags. Title, description, Open Graph and social card completeness.
• Redirects. The health of the redirect path to the final page, from HTTPS to chain length.

Built to be seen at a glance

Every card uses the same scoring scale, the same ring, the same colours and the same A to F grade, so the whole board reads as one system. That consistency is the point. You should be able to glance at seven cards and instantly know whether your site is in great shape or needs a day of work, without decoding seven different scales. And if every single card comes back an A, the page makes a proper fuss about it, because a perfect score across every check is genuinely worth celebrating.

For AI agents

Each underlying tool exposes its own plain-text endpoint for language models and agents at GET https://nitrosites.com/tools/<tool>/scan.php?url=<target>&format=agent. To assemble a full health picture, request the agent digest from each graded tool (seo-analyzer, security-scanner, speed-test, ssl-checker, ai-visibility, meta-inspector and redirect-tracer) and read the score and grade from each. No key or login required, soft rate limits apply, and results are cached briefly.

Frequently asked questions

What does Site Health Check actually do?

It takes a single website address and runs all seven graded Nitro Sites tools against it at the same time. Each tool returns a score out of 100 and an A to F grade, and they land on one screen as simple cards as each check finishes. It is the fastest way to see, at a glance, where a site is strong and where it needs work, without running seven separate tools by hand.

Which checks are included in the report card?

Seven of them. On-page SEO, website security, page speed and Core Web Vitals, the SSL/TLS certificate, AI visibility (whether assistants like ChatGPT and Claude can read the site), meta and social tags, and redirect-chain health. Each one is a full tool in its own right, and each card links straight to it for the detailed breakdown.

How is the score out of 100 and the grade worked out?

Every tool scores the site out of 100 on its own subject, then that score maps to a grade on one shared scale used across all Nitro Sites tools. 90 and above is an A, 75 to 89 is a B, 60 to 74 is a C, 45 to 59 is a D, and below 45 is an F. The overall grade on the dashboard is the average of every check that returned a result.

Is it safe to run on my site?

Yes. Every check is passive and read-only. The tools do only what an ordinary browser or search crawler already does, fetch the page and read its response. Nothing logs in, guesses passwords, injects anything or changes your site in any way. You can safely run it on your own sites and on any site you are researching.

Why did one of the cards say it could not run?

Each check runs independently, so a single slow or unavailable one never blocks the rest. If a check times out or a site cannot be reached for that particular test, its card shows as not available and the overall score is worked out from the checks that did complete. Just run it again, or open that card's tool directly to see the detail.

Do I need an account or a login?

No. Like every Nitro Sites tool, Site Health Check is free, needs no signup and asks for nothing but the website you want to check.