Preload Link Tag Generator
Easily generate preload, prefetch, and preconnect tags
開発ツール
preloadタグ生成
リソースヒント用のlinkタグを生成してページ表示速度を最適化
使い分けガイド
- preload:現在のページで確実に使うリソース(CSS、フォント等)
- prefetch:次のページで使う可能性のあるリソース
- preconnect:外部CDN等への接続を事前に確立
- dns-prefetch:外部ドメインのDNS解決のみ事前実行
- modulepreload:ESモジュールの事前読み込み
すべての処理はブラウザ内で完結します。データが外部に送信されることはありません。
About Preload Link Tag Generator
Resource Hints are HTML link elements that instruct the browser to preload resources or pre-establish connections.
Preload fetches resources needed for the current page at high priority, while prefetch loads resources that may be needed for the next navigation at low priority. Preconnect pre-establishes TCP connections and TLS handshakes with external domains, and dns-prefetch performs only DNS resolution in advance. Modulepreload is specifically designed for preloading ES modules.
Properly configuring these hints improves Core Web Vitals (LCP, FID, CLS) and page load speed. Font resources require the crossorigin attribute—omitting it causes the browser to double-fetch the resource. For responsive images, using imagesrcset and imagesizes enables optimal resource preloading based on device capabilities.
This tool generates correct link elements by selecting the rel attribute type and configuring URL, resource type (as attribute), MIME type, crossorigin attribute, and more. Built-in validation automatically checks for required settings like crossorigin for font and fetch resources, and ensures imagesrcset and imagesizes are used together. You can manage multiple tags and copy them all at once.
How to use Preload Link Tag Generator
- Select the rel attribute type (preload, prefetch, preconnect, dns-prefetch, or modulepreload)
- Enter the resource URL or path
- For preload, the as attribute (script, style, font, image, etc.) is required; optional for others
- Optionally configure MIME type, crossorigin attribute (required for fonts and fetch), and media attribute for responsive handling
- For responsive images, specify both imagesrcset and imagesizes
- Click 'Add Tag' to add to the list, repeat as needed
- Copy the generated HTML code and paste it inside your HTML <head>
Benefits of Preload Link Tag Generator
- Improve SEO scores by optimizing Core Web Vitals and site rankings
- Supports all 5 types of resource hints: preload, prefetch, preconnect, dns-prefetch, modulepreload
- Auto-validation for crossorigin on fonts and fetch resources
- Support for imagesrcset and imagesizes for responsive images
- media attribute support for conditional resource preloading
- Manage and copy multiple tags at once for large projects
- Detailed usage guidance for each rel type ensures proper selection
- Browser-only processing ensures security and no additional tools needed
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