Bookmarklets for checking the page you’re on

Drag to your bookmarks bar.

• Share-card tags — shows og:title, og:image and twitter:card for the current page.
• Icon links — lists declared favicons/apple-touch-icon/manifest.

Both run only in your browser and send nothing anywhere. Only if a problem is found, they offer (you confirm) to open my free check for the page you’re on.