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
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
. If it says something generic like "Home" or is missing entirely, that's an immediate fix.
Security Checklist
Website security protects both your business and your visitors. Even a simple blog should implement basic security headers.
Check these items:- HTTPS is enabled and HTTP redirects to HTTPS
- HSTS header is set (Strict-Transport-Security)
- Content Security Policy (CSP) header is configured
- X-Frame-Options header prevents clickjacking
- X-Content-Type-Options is set to nosniff
- Referrer-Policy header is configured
- No mixed content (HTTP resources on HTTPS pages)
- Server version is not exposed in response headers
- No sensitive information in HTML comments or source code
- SSL certificate is valid and not expiring soon
Accessibility Checklist
Accessibility isn't just about compliance - it's about reaching the widest possible audience. Over 1 billion people worldwide have some form of disability.
Check these items:- HTML lang attribute is set on the
element - All images have appropriate alt text (decorative images use alt="")
- Form inputs have associated labels
- Heading hierarchy is logical and sequential
- Sufficient colour contrast (minimum 4.5:1 for normal text)
- Interactive elements are keyboard accessible
- Focus states are visible
- ARIA landmarks are used for page regions
- Skip navigation link is available
- Page has a meaningful and unique title
- Error messages are descriptive and associated with inputs
Mobile Checklist
With over 60% of web traffic coming from mobile devices, mobile-friendliness is essential.
Check these items:- Viewport meta tag is correctly configured
- Text is readable without zooming (minimum 16px body font)
- Touch targets are at least 44x44 pixels
- Content doesn't overflow horizontally (no side-scrolling)
- Images are responsive and scale properly
- Forms are easy to fill on mobile
- Navigation works on small screens
Automate Your Audits
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.
Try it free at pagescore.dev - no signup required.