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Schema Peek

Inspect the page's JSON-LD and catch mismatches with the real content

chromeedgebraveoperafirefox🔒 Zero telemetryVersion 1.0.0
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Description

Schema Peek extracts every JSON-LD block (including @graph) from the rendered page, validates it (known schema.org types, @id present, ISO8601 dates) and flags mismatches between the schema's claims and the visible content: headline differing from H1/title, datePublished differing from the on-page date. Fully local, no AI or server calls.

Features

  • Extracts every <script type="application/ld+json">, flattening arrays and @graph
  • Basic validation: @type present, recognized schema.org types, recommended @id, ISO8601 dates
  • Detects schema headline/name mismatches against the visible H1 and title
  • Compares schema datePublished with the first visible on-page date
  • Resilient parsing: broken JSON blocks become errors without stopping the rest
  • 100% offline: no AI or server calls, zero telemetry (privacy constraint)

Privacy

100% local processing in your browser. Zero telemetry: no data is sent to external servers.

Required permissions

  • activeTab
  • scripting

Screenshots

Schema Peek

Supported browsers

chromeedgebraveoperafirefox