Free tool
AI Engine Compatibility Checker
See your page the way a crawler without JavaScript sees it, and how ready it is to be quoted in an AI answer. Paste any public page address.
- No account
- Public pages only
- Nothing changed on your site
Follows the documentation ofOpenAIGoogleSchema.org
What we look at
Four things decide whether a page can be quoted.
Google says optimising for AI search is still SEO: pages must be indexed, readable and helpful. These are the page-level basics underneath.
Text in the HTML
If your words only appear after JavaScript runs, a crawler that reads the HTML alone sees an empty page. Vendors do not all document whether they run JavaScript, so the safe assumption is that the text should be in the HTML the server sends.
A short, direct opening
Answer engines quote passages. A paragraph under the main heading that states the answer in 40 to 80 words is easy to lift; a greeting or a long preamble is not. This is a heuristic, not a rule any engine publishes.
A clear heading outline
One H1 and descriptive sub-headings, ideally some written as the questions customers ask, let a reader or a crawler jump straight to the part that answers.
Structured identity
JSON-LD that names who you are, with the properties search engines document, removes guesswork about what the page is and who published it.
Sources
Checked against the people who write the rules.
Where a vendor documents how its crawler behaves, this tool follows that documentation. These are the pages we rely on, so you can verify any claim yourself.
- OpenAI: crawlers and user agents ↗Purpose of OAI-SearchBot, GPTBot and ChatGPT-User, and how robots.txt applies to each.
- Google: common crawlers ↗Googlebot and the Google-Extended token, and what Google-Extended does not affect.
- Google: AI features and your website ↗How AI Overviews and AI Mode draw on the Search index.
- Schema.org ↗The vocabulary: types and the properties each one accepts.
- Google: structured data introduction ↗Which structured data Google can use and the guidelines for it.
Vendor documentation changes. Last reviewed against these pages on 3 November 2026. See the full methodology.
Questions
Straight answers.
Does this tool run JavaScript?
No. It reads the HTML the server sends, which is exactly what a crawler that does not run scripts receives. If your page looks empty here but full in a browser, that gap is the finding.
My site uses React or Next.js. Is that a problem?
Not by itself. What matters is whether the text arrives in the HTML. Server-rendered frameworks usually pass; pages that render everything in the browser usually do not.
Is the “opening paragraph” check a Google or OpenAI rule?
No. No engine publishes a rule for it. It reflects widely used guidance that quotable passages are short and self-contained, and we label it a heuristic wherever it appears.
Can I check a page other than my home page?
Yes. Paste any public page address. Each page is checked on its own.
Why not give a score?
Because the checks measure different things, and one number would hide a page that is empty without JavaScript behind a good heading outline. You get a count of checks passed and the evidence for each.
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Keep going.
Seeing it is half the job.
The app checks your pages again every week, records real AI answers for your customers’ questions, and applies the fixes you approve.