Tools / Canonical Checker
Canonical Checker
ページで宣言された canonical URL を検査します。相対値を解決し、ソース HTML 内の競合する宣言を特定します。
Your canonical report
Check a URL to see declarations, original values, and resolved destinations here.
URLは何をしますか このページの方がいいですか？
canonical 注釈は、重複または類似のコンテンツに対する優先 URL を表します。このチェッカーは、1 つのページの HTML からリンク要素を抽出し、解決された宛先の横に元の href を表示します。
このレポートはソース チェックであり、インデックス可能性の判定ではありません。有効なヘッド内の配置、HTTP リンク ヘッダー、JavaScript の変更、または Google が選択した canonical は検証されません。
Resolve the value, then review the intent
1. Inspect the page. Enter its public URL. If fetching is refused, paste the page source and supply the URL it came from. The URL check resolves relative values against the final fetched URL.
2. Compare declarations. Read the original href and resolved destination together. A different destination may be intentional for duplicate content; a matching destination is self-referencing. Neither result proves what is indexed.
3. Fix and recheck. Choose the intended representative page, keep one canonical annotation in a valid HTML head, and check the published source again. Inspect the destination separately before relying on it.
A relative path can be valid and still be worth replacing
On https://example.com/shop/item?ref=email, the value /shop/item resolves to https://example.com/shop/item. If that is the intended preferred page, publish the absolute value:
<link rel="canonical" href="https://example.com/shop/item">
A base href can change how a relative path resolves. Review the resolution base in the report before changing the tag.
Keep declarations separate from search-engine decisions
A declaration expresses a preference. A redirect changes where a request ends. Google’s indexed choice requires separate evidence from Search Console. Read Google’s canonical guidance before changing your implementation.
Once the declaration is clear, use the Title & Meta Checker to review the page’s search presentation, or explore SEO Site Audit for the broader workflow.