SEO tools for structured data
Free tools to write, validate and repair Schema.org markup. Everything runs in your browser: the code you paste is never sent to a server.
Runs locally in your browser
JSON-LD validator
Check pasted structured data against the properties Google requires and recommends. No URL, no crawl, no captcha.
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JSON-LD escape checker
Google now applies a single pass of HTML unescaping to JSON-LD. Double-escaped entities are no longer unrolled: see what Google actually reads, and get your block rewritten with standard JSON escapes.
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Schema markup generator
Fill in the fields Google documents for your type and get valid JSON-LD, ready to paste.
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Microdata and RDFa to JSON-LD
Convert legacy inline markup into the format Google recommends, without touching your templates by hand.
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Tools that work on a live URL
These fetch a published page instead of working on pasted code.