Schema Sniffer · Structured data
A closer look at your page's structured data.
Schema Sniffer reads the JSON-LD markup in your page's HTML and checks it against a set of rules. The report explains errors, incomplete information and possible additions for the page type.
You can also request draft markup to review. Check that every detail matches the page before using it.
Checking the page and preparing the findings...
Schema Sniffer · Your page check
What the check found
This checks JSON-LD in the fetched HTML. It may miss markup added by JavaScript. The findings do not predict rich results or AI citations.
- 0 errors
- 0 incomplete information
- 0 possible additions
How to read the score
The score starts at 100 and deducts the weights assigned to the findings. An error always moves the result into the lowest band, even when the numerical score is higher. A high score only describes these checks.
What to review
No issue was detected by these checks. Review the page in context, especially if it adds markup after JavaScript runs.
Draft markup to review
Check the name, URL and other details against the visible page. Replace placeholders and validate the markup before publishing it.
Help with structured data across your site.
If you'd like help reviewing several page types, I can check the findings, prepare suitable markup and work with your team on implementation.
How the sniff works
Fetch the page. The tool reads the HTML and extracts the JSON-LD blocks it finds.
Run the checks. It looks for parsing errors, incomplete information and possible additions relevant to the type of page.
Explain the findings. An AI model helps turn the results into readable explanations and draft markup. Review the suggestions before making changes.
Questions about the check
What does it check?
The tool extracts JSON-LD from the page HTML and applies its rules for errors, incomplete information and possible additions. The score summarises those checks; it does not rate every aspect of the page.
Does a good score guarantee rich results or AI citations?
No. It describes this tool's checks. Google does not guarantee rich results even when structured data meets its requirements. AI citation decisions are separate from this score.
Does it assess microdata and RDFa?
It flags their presence, but its detailed rules focus on JSON-LD. A different markup format isn't, by itself, a reason to replace working structured data.
Can it see markup added by JavaScript?
The current version checks the fetched HTML. It can miss markup that only appears after JavaScript runs. Check the rendered page separately if that applies to your site.
Is it free, and are there limits?
Yes. The on-screen findings are free and do not require an email address. Enter your email if you'd like the draft markup on screen and in your inbox.
The tool allows three checks per domain and 20 per network address each day.
Help with structured data across your site.
If you'd like help reviewing several page types, I can check the findings, prepare suitable markup and work with your team on implementation.
Evidence for the wording about rich results: Google's structured data guidelines.