言語

Favicon Checker

Free, no signup. Inspect every standard icon declaration, including the quiet fallbacks browsers use when a page does not declare anything.

Built by Patrick Stox

Checks run from our server; we fetch the URL you enter and don't keep the results. The page HTML and optional manifest are retrieved through bounded fetchers. Icon images load directly in your browser for their dimensions. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.

Feedback
Report a bug

Found something broken in Favicon Checker? Let us know what happened — this goes straight to a private triage queue, not a public list.

What will be sent 
 No tool inputs, uploads, pasted source, complete results, query parameters, or URL fragments are attached automatically. You can edit or remove the selected passage above. Browser and anti-abuse metadata is processed for spam prevention. 
  
 
  
 
 
  
 
 
  
 
       
     
   
How it works
A browser tab, iPhone home screen, pinned tab, Windows tile, and a web app manifest can all use different declarations. This checker parses rel=icon, Apple touch icons, mask icons, manifest icons, Microsoft application metadata, and the conventional /favicon.ico fallback, then loads each candidate in your browser to inspect its natural dimensions.
Frequently asked questions
Why is favicon.ico included when it is not linked?
Browsers commonly request /favicon.ico as a fallback, so the tool includes it even when the HTML has no icon declaration.
Can this know an image’s dimensions?
It loads icon images directly in your browser to read their natural dimensions. If a host blocks the image, the tool says dimensions could not be read.
What does the manifest probe fetch?
Only the declared manifest is fetched through a bounded same-origin endpoint, with a small JSON cap, so the tool can list its icons.
Next stepMeta Title Generator — generate the corrected version.

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Feature requests for Favicon Checker
 

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ツールについて
favicon、Apple touch icon、mask icon、manifest、Microsoftタイルの宣言を確認し、カバレッジの欠落と表示面をプレビューします。
URLを取得して各アイコンの存在、サイズ、形式、参照先を比較します。
機能
  • faviconと各種アイコン宣言の確認
  • manifest・Microsoftタイルの解析
  • 欠落・不一致の検出
  • ブラウザー表示面のプレビュー
仕組み
指定URLを取得し、link要素、manifest、Microsoftタイルのメタデータを抽出します。参照先、形式、サイズ、テーマ色を比較し、欠落と不整合を表示面ごとに分類します。
制限事項
  • 取得時点のHTMLとレスポンスだけを確認し、すべてのブラウザーやSNSのキャッシュ表示を保証しません。認証、robots、CORS、リダイレクトの影響を確認してください。
  • アイコン画像のデザイン品質やブランド適合性は判定しません。
よくある質問
faviconが1つあれば十分ですか？
ブラウザーや端末によって必要な形式が違うため、対応する表示面とmanifestを確認してください。
アイコン画像を自動生成しますか？
いいえ。宣言と参照先を検査し、欠落や不一致を示します。
取得したURLは保存されますか？
ツールの契約に従い、解析結果は確認用に扱います。公開URL以外の機密情報を入力しないでください。