A website health score tells you at a glance how your site performs across four critical areas: speed, accessibility, SEO, and security. Here's everything you need to know — and how to use it to grow your business.
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A website health score is a composite metric — typically 0 to 100 — that summarizes how well your website is functioning across multiple quality dimensions. Think of it like a report card: instead of one grade for all subjects, you get individual scores for performance, accessibility, SEO, and best practices, plus an overall picture.
The concept was popularized by Google's Lighthouse auditing tool, which scores websites on the same four categories. Tools like PageGuard use the same underlying engine (via the PageSpeed Insights API) but add ongoing monitoring, historical tracking, and alerts — so you're not discovering problems months after they happened.
Unlike a one-time speed test, a comprehensive health score accounts for whether search engines can properly read your site, whether users with disabilities can navigate it, and whether your site follows current security standards. It's a single number that captures the overall quality and health of your web presence.
Measures how fast your pages load for real users. Key metrics include Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) — collectively called Core Web Vitals.
Slow sites lose visitors. Google found that a 1-second delay in page load can reduce conversions by 7%. Performance is also a direct Google ranking factor via Core Web Vitals.
Evaluates whether all users — including those using screen readers, keyboard-only navigation, or with low vision — can access your site. Checks WCAG 2.1 guidelines and ADA compliance requirements.
1 in 4 Americans has a disability. ADA Title II requires government-related sites to meet WCAG 2.1 AA by April 2026. Private businesses face lawsuits — over 4,600 filed in 2023 alone.
Checks whether search engines can properly crawl, index, and understand your site. Reviews title tags, meta descriptions, structured data, crawlability, and mobile friendliness.
An SEO score below 90 often indicates technical issues that are actively hurting your Google rankings — missing meta descriptions, blocked resources, or broken structured data.
Audits security headers, HTTPS, browser compatibility, JavaScript errors, and modern web standards. Checks for known vulnerabilities in JavaScript libraries and proper content security policies.
A low Best Practices score often means Chrome is showing "Not Secure" warnings to visitors, or that your site loads vulnerable JavaScript libraries that could expose users to attacks.
| Score Range | Rating | What It Means | Action Required |
|---|---|---|---|
| 90–100 | Excellent | Your site is fast, accessible, and technically sound. Maintain this level. | Monitor for regressions |
| 70–89 | Good | There are opportunities to improve. Not urgent, but worth addressing. | Fix within 1–2 months |
| 50–69 | Needs Work | Issues are actively hurting user experience or search rankings. | Fix within 2–4 weeks |
| 0–49 | Poor | Serious problems. You're likely losing customers and rankings right now. | Fix immediately |
Important: These thresholds apply to each dimension individually. A site with a 95 Performance score but a 40 Accessibility score isn't healthy — it's failing one in four users and potentially violating ADA requirements. Aim for 90+ across all four dimensions.
Amazon calculated that a 100ms page delay cost them 1% in sales. For a typical e-commerce site doing $1M/year, a 1-second delay can cost $70,000 annually. A low performance score isn't a technical problem — it's a business problem.
ADA Title II now requires state and local government sites (and businesses serving them) to meet WCAG 2.1 AA by April 24, 2026. Private businesses face ADA lawsuits regularly — over 4,600 were filed in 2023. An accessibility score below 90 is a signal to get this reviewed. See our ADA Compliance 2026 Guide for details.
Google's ranking algorithm uses Core Web Vitals, mobile-friendliness, and crawlability as ranking signals. A low SEO score often points to technical issues blocking Google from properly understanding your content — meaning you're missing traffic you should be getting.
Chrome shows "Not Secure" warnings on sites without proper HTTPS or security headers. These warnings visibly reduce user trust and directly hurt conversion rates. A high Best Practices score means visitors see a secure, trustworthy site.
Running a one-time health check is useful, but the real value comes from continuous monitoring. Websites break. Plugins update. New content gets added. A score that was 95 last month might be 72 today because a developer accidentally deployed a 10MB uncompressed image.
The ideal monitoring setup catches these regressions within hours — not weeks. Here's what to look for in a monitoring solution:
Weekly or daily checks run without you having to remember. Set it and forget it until something breaks.
Get notified immediately when any dimension score drops — so you find out before your customers do.
See trend lines over weeks and months. Correlate score drops with specific deployments or content changes.
1 site, manual scans, and 7 days of history at no cost. Automated weekly scans with email alerts start at $9/month. Sign up and add your site in under 2 minutes.
Start monitoring free ›Free. No signup required for the first scan. Results in ~30 seconds.
A website health score is a 0–100 metric that measures how well your site performs across four dimensions: Performance (speed), Accessibility (usability for all users), SEO (search engine visibility), and Best Practices (security and modern standards). Scores of 90+ are excellent; below 50 is poor.
A score of 90 or above is considered excellent. Most well-maintained websites score between 70–89. Any dimension score below 70 needs attention. Accessibility below 90 may indicate ADA compliance exposure.
Enter your URL in the scan box above and click "Check My Score." PageGuard will run a comprehensive audit and show you four dimension scores plus a prioritized list of issues — completely free, no signup required.
For most businesses, weekly automated monitoring is sufficient. If you deploy code frequently, daily monitoring is better. PageGuard's Starter plan ($9/month) automates weekly scans and sends email alerts only when your score drops.
Google uses Core Web Vitals (from the Performance score) as a direct ranking signal. Accessibility issues can prevent Google from crawling your content. A low SEO score dimension often reveals technical issues directly hurting your Google rankings.