JSON-LD Tester – Structured Data & Agent Tools Inspector

Inspect, validate and test structured data and agent tools on any website — built for technical SEOs, web developers, agencies, and teams running shops and SaaS products. New in 2.5 • NEW (from user feedback): a block now opens on the code, with the findings collapsed below it — if you mostly read and copy markup, it is right there. The tree view and the findings list are one click away, and both are switchable in Settings. • Identical findings are grouped ("×4") instead of repeating for every duplicated entity — a big scroll saver on news pages with many similar articles. New in 2.4 • NEW: dataLayer tab — inspect and validate the page's GA4 events, Consent Mode and GTM containers without the console. • NEW: GA4 event validation — missing required parameters (e.g. purchase without transaction_id), non-numeric value ("129,00"), value 0, currency that is not an ISO 4217 code, items[] without item_id/item_name, events fired twice, legacy Universal Analytics structure. • NEW: Consent Mode v2 — reports missing ad_user_data/ad_personalization, update without or before default, and invalid values. • NEW: PII warning — e-mails, phone numbers, IBANs and card numbers in the dataLayer are detected and reported by path, never by value; they are masked in copies, reports and snapshots. • NEW: cross-check against the JSON-LD on the same page — price, currency and SKU mismatches between items[] and the Product markup. • NEW: snapshots — store locally (masked), filter and compare: added, removed, duplicated and changed events, also against the current page. • Read-only: dataLayer.push is never wrapped, nothing about the page changes. No new permissions. New in 2.3 • NEW: share preview per network – Facebook, LinkedIn, X, WhatsApp, Slack – each with that platform's truncation limits, image ratio and card layout. • NEW: complete Open Graph / Twitter tag checklist (essential and recommended). Twitter tags covered by Open Graph are shown as fallback instead of missing. • NEW: catches the real mistakes – og:url that does not match the canonical, relative or http:// og:image, name="og:…" instead of property= (Facebook ignores it), unknown twitter:card values. • NEW: image check on the measured file (only after you click "load preview") – below 1200×630, below the 200px minimum, odd aspect ratio, declared og:image:width/height that does not match the file. • NEW: hreflang validation – BCP-47 syntax (de_AT, en-UK, a country code used as a language), missing self-reference, missing x-default, duplicates and conflicting targets, relative URLs. • Tools tab: LinkedIn Post Inspector added, the retired X Card Validator link removed. New in 2.2 • New UI: wider window with a left navigation rail. • NEW: On-Page SEO tab – meta tags, headings, Open Graph & Twitter, hreflang, images (alt/title), links (internal/external, unique, nofollow), word count – with actionable issues. • NEW: Headers tab – HTTP response headers, indexability (index/follow), a robots.txt check for the current URL (Googlebot) and HTTP status. • NEW: Tools tab – quick access to common external validation and SEO tools. • NEW: Inspection report as PDF – all sections in a print-ready report (local, nothing uploaded). • Extension name & store listing localized (EN/DE/ES/IT/ZH); side panel auto-updates on tab/domain changes. • No new permissions – every new check is same-origin only. New in 2.1 • NEW: On-Page SEO tab – meta tags, heading outline, Open Graph & Twitter, hreflang, images/alt and links at a glance, with actionable issues. • NEW: Inspection report as PDF – export all sections (Structured Data, On-Page, Agent Tools, Readiness) as a print-ready report. Generated locally, nothing is uploaded. • Extension name & store listing are now localized (EN/DE/ES/IT/ZH). • Fix: the side panel now auto-updates on tab and domain changes. • No new permissions. **Structured Data** - Detect all JSON-LD blocks, including `@graph`, arrays and nested types - Clear valid / warning / error status per block - Tree view and raw view with syntax highlighting and search - Precise parse errors with line and column - Copy JSON, copy the full `<script>` tag, or download - One-click links to the matching schema.org docs - Canonical and robots at a glance - Open Google Rich Results Test or the Schema.org Validator with correct encoding — umlauts, accents, emojis and query strings are preserved **Agent Tools (experimental, WebMCP)** - Detect agent tools a page exposes via `document.modelContext` - See each tool's description, input/output schema, and annotations - Automatic static analysis: naming, descriptions, schema issues, safety - Risk classification: Low / Medium / High / Critical - A safe manual tester that builds a form from the input schema and never runs destructive tools without explicit, multi-step confirmation **Agent Readiness Score** - A local, transparent 0–100 score across structured data, tool availability, descriptions, schemas, safety, testability and semantics - Prioritized High / Medium / Low impact recommendations - Checks agent & crawler conventions: llms.txt, robots.txt AI-crawler access, sitemap discovery, and the ai.txt AI-training opt-out **Privacy first** - No visited URLs, page content or tool schemas are sent to any server - No ads, no tracking, no page modification - Minimal permissions: activeTab, scripting, storage ## Feature list - JSON-LD detection incl. `@graph`, arrays, nested types - Valid / Warning / Error / Experimental / Not-supported status badges - Tree & raw views, search, copy, copy `<script>`, download - Parse errors with line/column - Schema.org doc links; canonical & robots - Correct UTF-8 encoding for Google Rich Results / Schema.org Validator - WebMCP agent-tool detection (experimental) with feature detection - Static tool analysis + Low/Medium/High/Critical risk classification - Safe manual tool tester with risk-gated confirmations - Local Agent Readiness Score with prioritized recommendations - Li…