SEO fix guide
Invalid JSON-LD Structured Data
One or more JSON-LD blocks contain syntax errors or are malformed. Search engines cannot parse invalid JSON-LD, so any structured data benefits are lost.
Issue ID: STRUCT-JSONLD-INVALID-001
Severity: major
Impact: High
Effort: S
Use this article when
- You need deeper remediation guidance than the issue card can show.
- You want CMS-specific steps before handing the fix to a developer.
- You want a repeatable re-check path after shipping the change.
What this issue is
One or more JSON-LD blocks contain syntax errors or are malformed. Search engines cannot parse invalid JSON-LD, so any structured data benefits are lost.
Why it matters
One or more JSON-LD blocks contain syntax errors or are malformed. Search engines cannot parse invalid JSON-LD, so any structured data benefits are lost. This affects how clearly search engines understand the page and how persuasive it looks in search results.
How we detect it
- FreeSiteAudit flags this issue when the rule for STRUCT-JSONLD-INVALID-001 fails and the page evidence points to Dom body.
- You can usually confirm this by checking the page source or the relevant page settings inside your CMS.
Evidence examples
Check the affected page source, rendered output, or relevant CMS setting to confirm the missing or incorrect element.
How to fix it
- 1Validate JSON-LD blocks using a JSON validator
- 2Fix syntax errors such as trailing commas, missing quotes, or unescaped characters
- 3Test with Google's Rich Results Test after fixing
How to re-check it
- Confirm all JSON-LD blocks pass validation
Related tools
This issue is best verified with the full FreeSiteAudit crawl rather than a single-point mini tool.