Structured Data Tester
Paste JSON-LD or page HTML and validate it against required and recommended properties per schema type, with a clear report.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Paste JSON-LD or page HTML
Report
Detected items
Parsed JSON-LD
Checked locally in your browser. Nothing is uploaded.
How to Use Structured Data Tester
- Paste your structured data. Drop in a JSON-LD block, a full head, or raw JSON-LD. Script tags and the @graph format are read automatically.
- Select Test. The tool finds each item, reads its type, and checks it against the rules for that type.
- Read the report. Each line shows a pass, a warning, or an error, with a note on what to add.
- Check detected types. The detected items panel lists every type found and shows the parsed JSON-LD.
- Fix and re-test. Update your markup and run the test again until the report is clean.
Frequently Asked Questions
What does this tool test?
It reads your JSON-LD and checks each item for the required and recommended properties that search engines expect for that type.
Which types does it know?
Common types including Article, Product, Recipe, FAQ, LocalBusiness, Event, Breadcrumb, Organization, JobPosting, Person, and more.
Does it fetch my live URL?
No. You paste the markup yourself, which keeps the check private and works on pages that are not published yet.
How is this different from the Google test?
This is a fast, private check you can run on a draft. For final confirmation of rich result eligibility, also use the official Google test.
Does it support the @graph format?
Yes. Items inside an @graph array are read and checked individually, and arrays of blocks are handled too.
Is my data sent anywhere?
No. The check runs entirely in your browser, so nothing you paste is uploaded.
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