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CAPSTON Audit SEO: The Free Chrome Extension That Audits Any Page in One Click

CAPSTON Audit SEO is a free Chrome extension that runs an instant on-page audit of whatever page you are looking at: title and meta description, heading hierarchy, image alt tags, internal and external links, and content length — scored on a visual dashboard. One click tells you whether a page is structured well enough to be read, understood and reused — by Google and by AI engines. Because if a machine cannot parse your page, it will not cite it. And an uncited page sends you nothing.

Why audit pages now, and not later?

The way buyers find businesses is shifting under your feet. Google users are measurably less likely to click on links when an AI summary appears in the results (Pew Research Center, 2025). ChatGPT includes on average fewer than 7 sources per answer (6.88 — Zhang, He & Yao 2026, N = 21,143 citations). The answer layer is small, and it is closing. Pages with broken structure — missing H1s, empty alt tags, vague metas — do not make that cut. The businesses that audit and fix now take the citation slots. The ones that wait become invisible, and invisible means no visits, and eventually no clients.

What does the extension check?

Check	What it tells you	Why it matters for AI visibility
Title & meta description	Length and optimization metrics	The first thing engines extract to decide what your page answers
Heading hierarchy (H1–H3)	Whether your structure is machine-readable	AI engines select passages, not pages — broken hierarchy kills extraction
Image alt tags	Missing or empty ALT attributes	Unlabeled media is invisible content
Internal & external links	Link structure evaluation	Signals of authority and topical connection
Content length	Whether there is enough substance to cite	High-influence cited pages are longer and more modular (Zhang et al., 2026)
Visual SEO score	A dashboard with progress indicators	One number to compare pages — yours and your competitors’

Who is it for?

SEO specialists, marketers, developers and site owners who want an answer in seconds, not a crawl report in an hour. Open a page — yours or a competitor’s that keeps getting cited by ChatGPT — click the icon, and see exactly where the structural gap is. It is lightweight and runs without slowing your browser.

How do I install it?

Open the CAPSTON Audit SEO page on the Chrome Web Store.
Click Add to Chrome. The extension is free.
Open any page and click the CAPSTON icon to run your first audit.

Your data is not sold to third parties and is used only for the extension’s core functionality.

From one-page check to full AI visibility

The extension shows you what one page looks like to a machine. It does not tell you whether ChatGPT, Gemini or Perplexity actually mention your brand — or recommend your competitors instead. That is what the CapstonAI platform measures: your mention and citation share across engines, the blocker behind each gap, and the levers to fix it. Start with the extension, then run the full audit on your whole site.

Frequently asked questions

Is the CAPSTON Audit SEO extension free?

Yes. The Chrome extension is free to install and use. The full CapstonAI platform, which tracks AI visibility across engines, has its own plans and a free audit.

What does the extension analyze?

Title and meta description, heading hierarchy (H1, H2, H3), image alt tags, internal and external links, and content length — summarized in a visual SEO score.

Does it check AI visibility too?

It checks the on-page structure AI engines depend on to extract and cite content. To measure actual mentions and citations in ChatGPT, Gemini or Perplexity, use the CapstonAI platform’s free AI visibility audit.

Will it slow down my browser?

No. The extension is lightweight and runs its analysis only when you trigger it on a page.

Can I audit competitor pages with it?

Yes. It works on any page you open — which makes it a fast way to compare your structure against pages that AI engines already cite.

Install the free Chrome extension →

Then check if AI engines actually recommend you — free AI visibility audit →