Schema Validator: Check JSON-LD
Paste JSON-LD or a page's HTML to check structured data. The validator finds JSON syntax errors, lists every schema type it finds, and flags required fields that are missing for common types.
How to validate structured data
- Paste your JSON-LD, or view your page source and paste the whole HTML.
- Fix any JSON syntax errors first. One missing comma breaks the whole block.
- Add the missing required fields listed for each type.
- Confirm on the live page with Google’s Rich Results Test.
Common JSON-LD errors
| Error | Fix |
|---|---|
| Trailing comma before } or ] | Remove the last comma |
| Curly quotes from Word or WhatsApp | Use straight " quotes |
| Missing @context | Add "@context": "https://schema.org" |
| Required field missing | Add it, with the same value as on the page |
| Rating without review count | Add ratingCount or reviewCount from real reviews |
What this tool checks
It checks JSON syntax, finds every item with a @type, and compares it against the key required fields for common Google-supported types. It is a fast first check that runs privately in your browser. Google’s own tools also check your live page, images and policy rules.
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Frequently Asked Questions
Is this schema validator free?
Yes. It is free with no sign-up, and your code stays in your browser.
Is this the same as Google's Rich Results Test?
No. It is a quick syntax and required-field check. Use Google's test to confirm rich result eligibility on the live page.
Can it check microdata or RDFa?
It checks JSON-LD only, which Google recommends.
Why does my rating show an error?
AggregateRating needs a ratingValue and a ratingCount or reviewCount, based on real reviews.