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Guides2026-03-1912 min read

The Complete Website Audit Checklist for 2026 (40+ Things to Check)

A comprehensive checklist covering performance, SEO, security, accessibility, and mobile - everything you need to audit any website thoroughly.

Why Regular Website Audits Matter

A website audit is like a health check for your online presence. Without regular audits, small issues compound into serious problems: slow load times that drive away visitors, SEO mistakes that make you invisible to Google, and security gaps that put your users at risk.

The data is clear: 53% of mobile visitors leave a page that takes longer than 3 seconds to load. 68% of online experiences begin with a search engine. And a single data breach can cost a small business an average of $120,000.

Regular audits catch these problems before they cost you customers.

Performance Checklist

Performance directly impacts both user experience and search rankings. Google uses Core Web Vitals as a ranking factor, so a slow site hurts you twice.

Check these items:
  • Page loads in under 3 seconds on mobile
  • Total page size is under 3MB (ideally under 1.5MB)
  • Images are compressed and served in modern formats (WebP or AVIF)
  • CSS and JavaScript files are minified
  • GZIP or Brotli compression is enabled on the server
  • Browser caching headers are set for static assets
  • No render-blocking resources in the critical path
  • Fonts are loaded efficiently (font-display: swap)
  • Third-party scripts are loaded asynchronously
  • No unused CSS or JavaScript shipped to the browser
Quick test: Open Chrome DevTools, go to the Network tab, and reload your page. If you see files larger than 500KB or the waterfall chart stretches past 3 seconds, you have work to do.

SEO Checklist

SEO issues are often invisible to users but devastating to your search traffic.

Check these items:
  • Every page has a unique title tag (50-60 characters)
  • Every page has a meta description (150-160 characters)
  • Exactly one H1 tag per page containing your primary keyword
  • Heading hierarchy is logical (H1 then H2 then H3, no skipping levels)
  • All images have descriptive alt text
  • Canonical URLs are set correctly
  • Open Graph tags are present for social sharing
  • The site has a sitemap.xml submitted to Google Search Console
  • robots.txt allows crawling of important pages
  • Internal links use descriptive anchor text
  • URLs are clean and human-readable
  • No duplicate content issues
Quick test: Right-click any page, View Source, and search for </code>. If it says something generic like "Home" or is missing entirely, that's an immediate fix. <h2>Security Checklist</h2> <p>Website security protects both your business and your visitors. Even a simple blog should implement basic security headers.</p> <strong>Check these items:</strong> <ul><li>HTTPS is enabled and HTTP redirects to HTTPS</li> <li>HSTS header is set (Strict-Transport-Security)</li> <li>Content Security Policy (CSP) header is configured</li> <li>X-Frame-Options header prevents clickjacking</li> <li>X-Content-Type-Options is set to nosniff</li> <li>Referrer-Policy header is configured</li> <li>No mixed content (HTTP resources on HTTPS pages)</li> <li>Server version is not exposed in response headers</li> <li>No sensitive information in HTML comments or source code</li> <li>SSL certificate is valid and not expiring soon</li> </ul> <strong>Quick test:</strong> Visit your site and check the padlock icon in the address bar. Then use the Network tab in DevTools to inspect the response headers of your homepage. If you don't see security headers, your site is more exposed than it needs to be. <h2>Accessibility Checklist</h2> <p>Accessibility isn't just about compliance - it's about reaching the widest possible audience. Over 1 billion people worldwide have some form of disability.</p> <strong>Check these items:</strong> <ul><li>HTML lang attribute is set on the <code><html></code> element</li> <li>All images have appropriate alt text (decorative images use alt="")</li> <li>Form inputs have associated labels</li> <li>Heading hierarchy is logical and sequential</li> <li>Sufficient colour contrast (minimum 4.5:1 for normal text)</li> <li>Interactive elements are keyboard accessible</li> <li>Focus states are visible</li> <li>ARIA landmarks are used for page regions</li> <li>Skip navigation link is available</li> <li>Page has a meaningful and unique title</li> <li>Error messages are descriptive and associated with inputs</li> </ul> <strong>Quick test:</strong> Try navigating your entire site using only the Tab key. If you can't reach a button, click a link, or fill in a form, keyboard users can't either. <h2>Mobile Checklist</h2> <p>With over 60% of web traffic coming from mobile devices, mobile-friendliness is essential.</p> <strong>Check these items:</strong> <ul><li>Viewport meta tag is correctly configured</li> <li>Text is readable without zooming (minimum 16px body font)</li> <li>Touch targets are at least 44x44 pixels</li> <li>Content doesn't overflow horizontally (no side-scrolling)</li> <li>Images are responsive and scale properly</li> <li>Forms are easy to fill on mobile</li> <li>Navigation works on small screens</li> </ul> <strong>Quick test:</strong> Open your site on your phone. Can you read everything without squinting? Can you tap every button without accidentally hitting the wrong one? If not, mobile users are struggling. <h2>Automate Your Audits</h2> <p>Checking all 40+ items manually takes hours. That's why tools like PageScore exist - enter any URL and get a comprehensive audit covering all five categories in under 30 seconds, with specific fix recommendations for every issue found.</p> <strong>Try it free at <a href="https://pagescore.dev">pagescore.dev</a> - no signup required.</strong></div></article><section class="border-t border-gray-100 bg-gray-50"><div class="max-w-3xl mx-auto px-4 py-16 text-center"><h2 class="text-2xl font-bold text-gray-900 mb-3">Try PageScore for free</h2><p class="text-gray-500 mb-6">Audit any website in 30 seconds. No signup required.</p><a class="inline-block px-6 py-3 bg-gradient-to-r from-blue-500 to-violet-500 text-white rounded-lg font-medium hover:shadow-md transition-shadow" href="/">Start Free Audit</a></div></section></div><!--$--><!--/$--><script src="/_next/static/chunks/66a8c16702b8a250.js" id="_R_" 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Regular Website Audits Matter\u003c/h2\u003e\n\u003cp\u003eA website audit is like a health check for your online presence. Without regular audits, small issues compound into serious problems: slow load times that drive away visitors, SEO mistakes that make you invisible to Google, and security gaps that put your users at risk.\u003c/p\u003e\n\u003cp\u003eThe data is clear: 53% of mobile visitors leave a page that takes longer than 3 seconds to load. 68% of online experiences begin with a search engine. And a single data breach can cost a small business an average of $120,000.\u003c/p\u003e\n\u003cp\u003eRegular audits catch these problems before they cost you customers.\u003c/p\u003e\n\u003ch2\u003ePerformance Checklist\u003c/h2\u003e\n\u003cp\u003ePerformance directly impacts both user experience and search rankings. Google uses Core Web Vitals as a ranking factor, so a slow site hurts you twice.\u003c/p\u003e\n\u003cstrong\u003eCheck these items:\u003c/strong\u003e\n\u003cul\u003e\u003cli\u003ePage loads in under 3 seconds on mobile\u003c/li\u003e\n\u003cli\u003eTotal page size is under 3MB (ideally under 1.5MB)\u003c/li\u003e\n\u003cli\u003eImages are compressed and served in modern formats (WebP or AVIF)\u003c/li\u003e\n\u003cli\u003eCSS and JavaScript files are minified\u003c/li\u003e\n\u003cli\u003eGZIP or Brotli compression is enabled on the server\u003c/li\u003e\n\u003cli\u003eBrowser caching headers are set for static assets\u003c/li\u003e\n\u003cli\u003eNo render-blocking resources in the critical path\u003c/li\u003e\n\u003cli\u003eFonts are loaded efficiently (font-display: swap)\u003c/li\u003e\n\u003cli\u003eThird-party scripts are loaded asynchronously\u003c/li\u003e\n\u003cli\u003eNo unused CSS or JavaScript shipped to the browser\u003c/li\u003e\n\u003c/ul\u003e\n\u003cstrong\u003eQuick test:\u003c/strong\u003e Open Chrome DevTools, go to the Network tab, and reload your page. If you see files larger than 500KB or the waterfall chart stretches past 3 seconds, you have work to do.\n\u003ch2\u003eSEO Checklist\u003c/h2\u003e\n\u003cp\u003eSEO issues are often invisible to users but devastating to your search traffic.\u003c/p\u003e\n\u003cstrong\u003eCheck these items:\u003c/strong\u003e\n\u003cul\u003e\u003cli\u003eEvery page has a unique title tag (50-60 characters)\u003c/li\u003e\n\u003cli\u003eEvery page has a meta description (150-160 characters)\u003c/li\u003e\n\u003cli\u003eExactly one H1 tag per page containing your primary keyword\u003c/li\u003e\n\u003cli\u003eHeading hierarchy is logical (H1 then H2 then H3, no skipping levels)\u003c/li\u003e\n\u003cli\u003eAll images have descriptive alt text\u003c/li\u003e\n\u003cli\u003eCanonical URLs are set correctly\u003c/li\u003e\n\u003cli\u003eOpen Graph tags are present for social sharing\u003c/li\u003e\n\u003cli\u003eThe site has a sitemap.xml submitted to Google Search Console\u003c/li\u003e\n\u003cli\u003erobots.txt allows crawling of important pages\u003c/li\u003e\n\u003cli\u003eInternal links use descriptive anchor text\u003c/li\u003e\n\u003cli\u003eURLs are clean and human-readable\u003c/li\u003e\n\u003cli\u003eNo duplicate content issues\u003c/li\u003e\n\u003c/ul\u003e\n\u003cstrong\u003eQuick test:\u003c/strong\u003e Right-click any page, View Source, and search for \u003ccode\u003e\u003ctitle\u003e\u003c/code\u003e. If it says something generic like \"Home\" or is missing entirely, that's an immediate fix.\n\u003ch2\u003eSecurity Checklist\u003c/h2\u003e\n\u003cp\u003eWebsite security protects both your business and your visitors. Even a simple blog should implement basic security headers.\u003c/p\u003e\n\u003cstrong\u003eCheck these items:\u003c/strong\u003e\n\u003cul\u003e\u003cli\u003eHTTPS is enabled and HTTP redirects to HTTPS\u003c/li\u003e\n\u003cli\u003eHSTS header is set (Strict-Transport-Security)\u003c/li\u003e\n\u003cli\u003eContent Security Policy (CSP) header is configured\u003c/li\u003e\n\u003cli\u003eX-Frame-Options header prevents clickjacking\u003c/li\u003e\n\u003cli\u003eX-Content-Type-Options is set to nosniff\u003c/li\u003e\n\u003cli\u003eReferrer-Policy header is configured\u003c/li\u003e\n\u003cli\u003eNo mixed content (HTTP resources on HTTPS pages)\u003c/li\u003e\n\u003cli\u003eServer version is not exposed in response headers\u003c/li\u003e\n\u003cli\u003eNo sensitive information in HTML comments or source code\u003c/li\u003e\n\u003cli\u003eSSL certificate is valid and not expiring soon\u003c/li\u003e\n\u003c/ul\u003e\n\u003cstrong\u003eQuick test:\u003c/strong\u003e Visit your site and check the padlock icon in the address bar. Then use the Network tab in DevTools to inspect the response headers of your homepage. If you don't see security headers, your site is more exposed than it needs to be.\n\u003ch2\u003eAccessibility Checklist\u003c/h2\u003e\n\u003cp\u003eAccessibility isn't just about compliance - it's about reaching the widest possible audience. Over 1 billion people worldwide have some form of disability.\u003c/p\u003e\n\u003cstrong\u003eCheck these items:\u003c/strong\u003e\n\u003cul\u003e\u003cli\u003eHTML lang attribute is set on the \u003ccode\u003e\u003chtml\u003e\u003c/code\u003e element\u003c/li\u003e\n\u003cli\u003eAll images have appropriate alt text (decorative images use alt=\"\")\u003c/li\u003e\n\u003cli\u003eForm inputs have associated labels\u003c/li\u003e\n\u003cli\u003eHeading hierarchy is logical and sequential\u003c/li\u003e\n\u003cli\u003eSufficient colour contrast (minimum 4.5:1 for normal text)\u003c/li\u003e\n\u003cli\u003eInteractive elements are keyboard accessible\u003c/li\u003e\n\u003cli\u003eFocus states are visible\u003c/li\u003e\n\u003cli\u003eARIA landmarks are used for page regions\u003c/li\u003e\n\u003cli\u003eSkip navigation link is available\u003c/li\u003e\n\u003cli\u003ePage has a meaningful and unique title\u003c/li\u003e\n\u003cli\u003eError messages are descriptive and associated with inputs\u003c/li\u003e\n\u003c/ul\u003e\n\u003cstrong\u003eQuick test:\u003c/strong\u003e Try navigating your entire site using only the Tab key. If you can't reach a button, click a link, or fill in a form, keyboard users can't either.\n\u003ch2\u003eMobile Checklist\u003c/h2\u003e\n\u003cp\u003eWith over 60% of web traffic coming from mobile devices, mobile-friendliness is essential.\u003c/p\u003e\n\u003cstrong\u003eCheck these items:\u003c/strong\u003e\n\u003cul\u003e\u003cli\u003eViewport meta tag is correctly configured\u003c/li\u003e\n\u003cli\u003eText is readable without zooming (minimum 16px body font)\u003c/li\u003e\n\u003cli\u003eTouch targets are at least 44x44 pixels\u003c/li\u003e\n\u003cli\u003eContent doesn't overflow horizontally (no side-scrolling)\u003c/li\u003e\n\u003cli\u003eImages are responsive and scale properly\u003c/li\u003e\n\u003cli\u003eForms are easy to fill on mobile\u003c/li\u003e\n\u003cli\u003eNavigation works on small screens\u003c/li\u003e\n\u003c/ul\u003e\n\u003cstrong\u003eQuick test:\u003c/strong\u003e Open your site on your phone. Can you read everything without squinting? 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