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SEO Checker

Check meta tags, share cards, structured data and multilingual settings from a single URL

Fetching and analyzing the page...

Findings
What this tool actually checks

Most SEO checkers simply list which tags are present and which are missing. This tool looks for contradictions between tags: a page with noindex whose canonical points to itself, an hreflang set that is missing its self-reference so Google ignores the whole set, an og:image written as a relative path so the image disappears entirely when the page is shared. Each tag looks fine on its own — this tool points out where they stop fitting together.

Four inspection areas

  • Meta tags: Predicts by pixel width whether the title and description get truncated in search results, and checks duplicate canonical declarations, what each robots directive actually means, the number of h1 elements, and the share of images missing alt.
  • Platform previews: Every platform reads different tags in a different order. The tool shows which tags each platform reads and in what order, and whether that ordering comes from official documentation or from observed behavior.
  • Structured data: Parses JSON-LD all the way through @graph, and tells you where broken JSON breaks. It checks each type against Google's rich result requirements to judge eligibility, and draws how the result would actually look in search.
  • Multilingual: Actually fetches the hreflang target pages to see whether the references are reciprocal. It catches a missing self-reference, a missing x-default, code mistakes such as writing kr instead of ko, and conflicts with canonical.

Estimates and established facts are labeled separately

The pixel limits for search result truncation are industry estimates that appear nowhere in Google's official documentation. Among the platforms, only X and Slack document their fallback chain officially; the rest are based on observation. This tool does not hide that difference — it labels the evidence level of every item.

Frequently Asked Questions

FAQ rich results were fully retired on 7 May 2026. In 2023 they were merely limited to government and health sites; now they are gone with no exceptions, and the documentation has been taken down as well. HowTo was retired back in 2023. That said, there is no rush to strip out markup you have already added. Google's position is that unused structured data causes no problems, so removing it would be wasted effort.

Every page in an hreflang set must include an hreflang pointing at itself. If the Korean page points only to the English and Japanese versions and leaves itself out, Google ignores the entire set. The same goes for reciprocity: if A points to B, B must point back to A — with only one direction, the relationship does not hold. This tool actually fetches the target pages to confirm that an hreflang pointing back exists.

Because Google explicitly forbids rating your own organization or your own location on your own site (self-serving reviews). Attaching aggregateRating to Organization or LocalBusiness is the most common violation in practice, and it produces no rich result. Ratings are only valid when the item being reviewed is a third party.

Even with perfect tags, Kakao only scrapes domains registered under [Product link management] > Web domain in your Kakao Developers app. If the domain is not registered, no preview appears no matter what your og tags say. This condition cannot be checked from outside, so this tool cannot test it either — if every other platform works and only KakaoTalk doesn't, start here.

The limit is pixel width, not character count. Korean characters are nearly twice as wide as Latin letters, so the same 30 characters get cut at a different point. This tool estimates pixels using per-character-class widths and draws what the truncation looks like. Keep in mind, though, that these figures are industry estimates absent from Google's official documentation, and that Google often rewrites titles to match the query.
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