She Knows Digital Sp z o.o.

Extract, audit & visualize structured data. Schema markup checker & viewer for JSON-LD, microdata & RDFa — built for SEO.

Schema Markup Extractor & Visualizer 🔍 - instantly see, audit, and export every piece of schema markup and structured data on any web page. Read JSON-LD, microdata, and RDFa without digging through view-source. Rich results don't happen by accident. For SEOs who know valid ≠ correct. 🏷️ SCHEMA DETECTION IN THE TOOLBAR A badge on the icon shows how many schema items are on the page - instant structured-data detection as you browse. Hover to see the schema types present (Product, Article, BreadcrumbList, Organization…). It keeps up on single-page apps (Next.js, Nuxt) where schema is injected after navigation. ⚡ ONE-CLICK SCHEMA SUMMARY Click the icon for a quick popup: total schema count, a breakdown by format, and a chip for every schema type found. Open the full report in one click. 🌳 SCHEMA VIEWER: TREE OR TABLE - Tree: clean, pretty-printed JSON-LD. - Table: every property flattened (offers.price, brand.name, itemListElement[0].name) The fastest way to audit exactly what your schema markup contains. Each schema item shows five metrics: levels deep, schema types, unique properties, objects, and schema blocks. 🧩 THREE FORMATS, ONE VIEW Extract JSON-LD, microdata, and RDFa schema. Microdata and RDFa are normalized to JSON-LD shape (@context, @type, @id), so every format reads and exports the same way. ✅ VALIDATE IN ONE CLICK Test the page's structured data in Google's Rich Results Test and the Schema.org validator, linked straight from the report. 🎨 VISUALIZE YOUR SCHEMA Every item has a Visualize button that opens the Schema Markup Visualizer at magstags.com - render your structured data as an interactive tree with type badges, property counts, and nesting depth. 📤 EXPORT FOR AUDITS - Copy all schema as JSON (with page URL and timestamp) - Download .json - Download .csv - one row per schema block, for cross-page structured-data audits - Properties .csv - one row per flattened property, for property-level pivots - Copy a Markdown summary table CSV is UTF-8 with BOM, so Excel handles international characters correctly. 🌓 LIGHT AND DARK MODE A theme toggle that's remembered across sessions. 🔒 PRIVATE BY DESIGN Runs locally. It reads the page to count schema items and their types for the toolbar badge - nothing leaves your browser. No analytics, no tracking. External sites open only when you click Visualize or a validator link. 👤 WHO IT'S FOR SEO professionals, technical SEOs, web developers, and anyone auditing schema markup and structured data on production sites, from a single Product schema to a deeply nested ProductGroup. 🧩 PERMISSIONS activeTab: read the page when you open the popup scripting: inject the extraction code at click time storage: pass results to the viewer and remember your theme access to all sites: for the content script that detects schema and sets the toolbar badge on every page