Checks / Titles, headings and schema
Structured data does not parse
A JSON-LD block on the page is not valid JSON, so crawlers ignore it completely.
schema_invalid · Titles, headings and schema · Warning
What to change
Fix the JSON syntax (a missing comma or quote) and validate it at validator.schema.org.
How common it is
We have not measured how common this is on a sample of sites. Counts appear here when a study covers it.
About this check
| Check ID | schema_invalid |
|---|---|
| Report section | Titles, headings and schema |
| Severity | Warning |
| How it is decided | Measured: read directly from the page or the server's response. |
| Added | Version 3, 19 October 2026 |
| Status | Measured in every report |
| Report gives the code | No, the fix is described in words |
Related checks
- No structured data (schema)
- Organization schema has broken links
- Home page has no Organization schema
- Product page without Product schema
- Structured data Google detects but rejects
- Article without Article schema
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