SEO and social-preview validation tools

Reference list for verifying structured data, Open Graph cards, search-engine indexing, robots.txt, and performance metrics.

Structured data (JSON-LD)

ToolURLWhat it checks
Google Rich Results Test search.google.com/test/rich-results Whether Google parses your Person block, and whether it qualifies for any Rich Result enhancements.
Schema.org Validator validator.schema.org Strict syntax-and-vocabulary check; flags unknown properties or wrong types.

Open Graph and social previews

ToolURLWhat it checks
LinkedIn Post Inspector linkedin.com/post-inspector Renders the actual LinkedIn preview; force-refreshes LinkedIn’s cache.
Facebook Sharing Debugger developers.facebook.com/tools/debug Same idea for Facebook, WhatsApp, Messenger and Instagram link previews. The most permissive OG validator — surfaces warnings other platforms hide.
opengraph.xyz opengraph.xyz Third-party renderer showing previews for LinkedIn, X, Discord, Slack and WhatsApp side-by-side, no sign-in.
metatags.io metatags.io Similar multi-platform OG preview.

Search-engine submission and indexing

ToolURLWhat it does
Google Search Console search.google.com/search-console Verify domain ownership, submit sitemap.xml, see which URLs Google has indexed, view the search queries that surface your page.
Bing Webmaster Tools bing.com/webmasters Same for Bing — also relevant because Bing’s index feeds DuckDuckGo and ChatGPT search citations.
Yandex Webmaster webmaster.yandex.com Same for Yandex.

robots.txt validation

ToolURLWhat it does
Google Search Console Settings → robots.txt Tests whether Googlebot interprets your file as intended.
TechnicalSEO robots.txt tester technicalseo.com/tools/robots-txt/ Third-party version that simulates multiple user agents.

Performance (Core Web Vitals)

ToolURLWhat it checks
PageSpeed Insights pagespeed.web.dev LCP, INP, CLS — Google’s own measurement, the one that feeds search rankings.
WebPageTest webpagetest.org Detailed waterfall view; useful for confirming preload behaviour.

Recommended order

  1. Rich Results Test with your URL — confirm the Person JSON-LD parses cleanly with no warnings.
  2. opengraph.xyz — instant multi-platform preview without signing in anywhere.
  3. LinkedIn Post Inspector — force a fresh scrape so LinkedIn’s cache holds the new OG card from the start.
  4. Facebook Sharing Debugger — flags more issues than LinkedIn’s tool.
  5. Google Search Console — verify ownership, submit /sitemap.xml, check robots.txt interpretation.
  6. PageSpeed Insights — measure LCP, INP, CLS.