Diagnostic tool

Canonical Checker

Check whether a page's canonical tag points to the right URL and whether it may confuse search engines.

Related tools

Noindex Checker
Detect noindex meta tags and X-Robots-Tag headers on a page.
Redirect Chain Checker
Trace every hop in a redirect chain to spot loops and excessive redirects.
Sitemap Checker
Test whether your XML sitemap is reachable, valid, and parseable.