01
Hreflang checker
Paste one URL or a short list. We fetch the page, read HTML and HTTP Link tags, then follow declared alternates (up to 12) and flag missing return tags, bad language codes and a missing x-default.
Open the hreflang checker
02
Sitemap checker
Paste a sitemap or a homepage. We find the XML, parse listed URLs, flag duplicates and mixed hosts, then sample 25 for 200, redirects and 404s.
Open the sitemap checker
03
robots.txt tester
Paste a file or a homepage. We fetch robots.txt, test your paths, and show the Allow or Disallow line that won for Googlebot and a few other agents.
Open the robots.txt tester
04
Canonical tag checker
Paste one URL or a short list. We fetch the page, read HTML and HTTP canonical signals, and flag missing, conflicting, redirected or noindexed canonicals.
Open the canonical tag checker
05
Noindex checker
Paste one URL or a short list. We fetch the page, read meta robots and X-Robots-Tag directives, then warn if robots.txt blocks crawlers before they can see the noindex.
Open the noindex checker
06
Redirect chain checker
Paste one URL or a short list. We trace every redirect hop, flag loops, temporary redirects, long chains, HTTPS downgrades, and broken targets.
Open the redirect chain checker
07
Open Graph checker
Paste one URL or a short list. We read og and twitter tags, fetch the share image, and preview the card.
Open the Open Graph checkerWhy these tools exist
Most “SEO platforms” bury a simple check behind a signup. We would rather ship a focused checker people actually finish using.
We built this for our own work, then put it here so other people can use it too, free, no account. We cap each run so it stays quick for the next person.