All 40 website audit checks, explained
Every audit, on every plan, runs all 40 checks. Free and Pro both scan all 40. Pro hands you the AI fix for each one, ranked by revenue impact.
Critical
9 checksRead the audit checklist guide
Broken internal links (4xx)
Links on your site that lead to a missing page.
Try the free Broken Link CheckerMissing title tag
The page has no title for search results and browser tabs.
Try the free Title Tag CheckerMissing meta description
No summary for Google to show under the title.
Try the free Meta Description CheckerNo SSL / mixed content
The page, or something on it, loads without the padlock.
Try the free HTTPS & Mixed Content CheckerRobots.txt blocking pages
Your crawler rules are hiding pages from Google.
Try the free Robots.txt CheckerRedirect chains
A link that bounces through several addresses before it lands.
Try the free Redirect Chain Checker
Performance
6 checksRead the Core Web Vitals guide
Largest Contentful Paint (LCP)
How long until the main part of the page is visible.
Try the free Core Web Vitals CheckerCumulative Layout Shift (CLS)
How much the page jumps around while it loads.
Try the free Core Web Vitals CheckerInteraction to Next Paint (INP)
How quickly the page responds to a tap or click.
Try the free Core Web Vitals CheckerUncompressed images >100kb
Large image files that slow the page down.
Try the free Image Optimisation CheckerRender-blocking resources
Scripts and styles that hold up the first paint.
Image dimensions and modern formats
Images without set sizes, or in older formats like PNG.
SEO
6 checksSitemap.xml valid
The list of pages you hand to search engines.
Mobile-friendliness
Whether the page works on a phone.
Structured data (JSON-LD)
A hidden label that tells Google and AI assistants what the page is.
Try the free Structured Data CheckerCanonical tag present
Which address is the official copy of a page.
Heading hierarchy
Headings in a sensible order: H1, then H2, then H3.
Quick wins
10 checksMeta description length
Summaries too short or too long to show in full.
Try the free Meta Description CheckerImages missing alt text
Pictures with no description for screen readers and Google.
Try the free Alt Text CheckerMissing <html lang> attribute
Tells browsers and screen readers what language the page is in.
Missing favicon
The small icon in the browser tab.
JavaScript console errors
Script errors a visitor’s browser reports while loading.
Security headers
Instructions to the browser that block common attacks.
Try the free Security Headers CheckerTLS certificate expiry
The padlock. It expires and has to be renewed.
Try the free SSL Certificate Checker
AI Visibility
9 checksRead how the AI Visibility score works
llms.txt file
A short plain-text summary of your site written for AI assistants.
Try the free llms.txt CheckerAI crawler access
Whether the bots behind ChatGPT, Perplexity and Claude may read your pages.
Try the free AI Visibility CheckerAI crawler firewall blocking
A firewall or CDN turning AI bots away even when robots.txt allows them.
Try the free AI Visibility CheckerAI citation schema
Markup that names your organisation so AI answers can credit you.
Try the free AI Visibility CheckerAnswer engine schema
FAQ and how-to markup that AI answers lift from.
Try the free AI Visibility CheckerSemantic content structure
The article kept apart from menus and footers, so AI reads the right part.
Try the free AI Visibility CheckerContent freshness signals
Machine-readable publish and update dates.
Try the free AI Visibility CheckerQuestion-format headings
Headings phrased as the questions people ask.
Try the free AI Visibility Checker
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