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Website Health Check: Complete Site Audit in One Narzędzie

A comprehensive website health check is essential for maintaining peak performance across search rankings, user experience, security, and accessibility. Our free Website Health Check tool consolidates 45 critical checks across 5 categories into a single audit, giving you a clear picture of your site's strengths and weaknesses with an actionable improvement roadmap.

Why Regular Website Audits Matter

Websites are living systems that degrade over time without active maintenance. Plugins get outdated, SSL certificates expire, broken links accumulate, and performance slowly deteriorates as new content and features are added. A study by Semrush found that 80% of websites have at least one critical SEO issue, while 65% have security vulnerabilities that could be exploited. Regular audits catch these problems before they impact rankings, user trust, or security.

Google's algorithm evaluates hundreds of signals, many of which relate directly to technical site health. Core Web Vitals, HTTPS status, mobile-friendliness, crawlability, and structured data accuracy all influence how your pages rank. A single overlooked issue, like a missing canonical tag causing duplicate content or a misconfigured robots.txt blocking important pages, can significantly harm organic traffic.

SEO Health: The Foundation of Visibility

The SEO category evaluates 15 critical elements that directly influence search engine visibility. Title tags should be unique, descriptive, and under 60 characters. Meta descriptions should be compelling calls-to-action under 160 characters. Every page needs exactly one H1 tag that clearly describes the page content. Canonical URLs prevent duplicate content issues that dilute ranking signals across multiple URLs.

Open Graph and Twitter Card meta tags ensure your content displays correctly when shared on social media, driving additional traffic and engagement. A valid robots.txt file guides search engine crawlers, while an XML sitemap helps them discover all your important pages. Missing or misconfigured structured data (Schema.org markup) means missing out on rich results that can increase click-through rates by up to 30%.

Speed Performance: User Experience and Rankings

The speed category covers 10 checks focused on load performance. Image optimization is typically the highest-impact change, as unoptimized images account for the majority of page weight on most websites. CSS and JavaScript minification reduces file sizes, while GZIP or Brotli compression reduces transfer sizes by 60-80%. Browser caching allows returning visitors to load your site significantly faster by storing static assets locally.

Lazy loading defers the loading of below-the-fold images and iframes until they are needed, reducing initial page load time. Render-blocking resources, particularly synchronous JavaScript and CSS in the document head, delay the browser from displaying content. Moving scripts to the footer or using async and defer attributes can dramatically improve perceived load speed.

Security: Protecting Your Site and Users

The security category evaluates 10 checks that protect your website and its visitors. HTTPS is now a baseline requirement. Beyond the SSL certificate itself, security headers like HTTP Strict Transport Security (HSTS), Content Security Policy (CSP), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy provide layered protection against common attack vectors including cross-site scripting, clickjacking, and MIME type confusion.

These headers take minutes to configure but provide significant protection. Google Chrome and other browsers now display security warnings for sites without HTTPS, and Google has confirmed HTTPS as a ranking signal. Sites handling any form of user data, including contact forms and newsletter signups, have a legal obligation under GDPR and other privacy regulations to implement adequate security measures.

Mobile Optimization: The Majority of Your Traffic

With mobile devices accounting for over 60% of global web traffic, mobile optimization is not optional. Google uses mobile-first indexing, meaning it primarily evaluates the mobile version of your site for ranking purposes. The mobile category checks for a proper viewport meta tag, readable font sizes (minimum 16px base), adequate tap target sizes (minimum 48x48 pixels with proper spacing), and responsive design that adapts to all screen sizes.

Accessibility: Legal Compliance and Inclusivity

Web accessibility ensures your site is usable by people with disabilities, including visual, auditory, motor, and cognitive impairments. Beyond being the right thing to do, accessibility is a legal requirement under the ADA in the United States and the European Accessibility Act in the EU. The accessibility category checks for image alt text, ARIA landmarks, color contrast ratios, keyboard navigation support, and focus management. Accessible websites also tend to rank better because they have cleaner HTML, better semantic structure, and improved usability signals.

Understanding Your Health Score

Your overall health score is calculated as a weighted average across all five categories. SEO carries the highest weight at 30% because it most directly impacts organic visibility. Speed accounts for 25%, reflecting its importance for both user experience and rankings. Security is weighted at 20%, mobile at 15%, and accessibility at 10%. Each individual check within a category contributes equally. The letter grade provides a quick reference: A sites are well-optimized, while F sites need immediate attention across multiple areas.