For transactional email
Consider SMTP2GO for website-generated messages, form notifications, account notices, and other outbound system email.
Explore SMTP2GOAvailableFree browser-local analysis
Structured Data Checker
SiteTend Structured Data
Find invalid JSON-LD, incomplete schema objects, nesting problems, and inconsistent URLs before publishing.
Your input stays private.HTML and JSON-LD are analyzed in your browser.
Paste HTML or JSON-LD
Add a full page, a script element, or a direct JSON-LD payload.
Review the schema
Start with invalid JSON and missing required properties.
Your analysis will appear here
Paste HTML or JSON-LD and select Analyze structured data.
Help
Describe visible page content accurately
Use the most specific relevant Schema.org types, include accurate core properties, connect related entities, and keep URLs aligned with canonical HTTPS destinations.
Follow the JSON-LD pre-publication checklist for a layered review from syntax through live URL testing.
Questions
Structured Data Checker FAQ
What does the Structured Data Checker analyze?
It checks JSON and JSON-LD validity, common schema types, required and recommended properties, nesting, images, SearchAction, and URL consistency.
Which schema types receive detailed checks?
BreadcrumbList, Organization, Article, NewsArticle, BlogPosting, Product, FAQPage, LocalBusiness, WebSite, and SearchAction.
Does valid structured data guarantee a rich result?
No. Search engines apply additional content, quality, eligibility, and policy requirements.
Does SiteTend store pasted content?
No. Analysis runs in your browser, and pasted content is excluded from analytics.
Apply the result
From finding to verified fix
Interpret the finding
Fix invalid JSON and missing required properties first, then confirm that every claim matches visible page content.
Common causes to inspect
- Template values left empty
- Incorrect nesting or property types
- Markup copied between pages without updating entities
Practical next steps
- Correct the reported syntax and properties
- Compare markup with visible content
- Validate the deployed page with the relevant search tool
What this check cannot prove
Valid syntax does not guarantee eligibility, a rich result, accuracy, or compliance with type-specific search policies.
Recommended resources
Useful next steps for operating a website
For measuring business inquiries
Use WhatConverts to measure which marketing sources produce calls, forms, and leads. It measures outcomes; it does not fix technical website issues.
Explore WhatConvertsFor personal-data privacy
Consider Optery if exposed personal information or data-broker listings are a concern. It is a separate privacy resource, not an SEO or website-security scanner.
Explore OpterySiteTend may earn a commission if you purchase through these links, at no additional cost to you. These services are optional and separate from SiteTend's free checks.