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Resource Hint Generator - Online Preload, Prefetch, Preconnect

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Resource Hint Generator

Generate optimized <link> tags for preload, prefetch, preconnect and dns-prefetch to speed up your website.

Add New Resource Hint
Please enter a valid URL (including https://).
Configure the resource hint and click "Add Hint". You can build an entire list of hints.
Your Resource Hints
  • No hints added yet. Start by adding a resource hint above.

Frequently Asked Questions

Resource hints are HTML <link> elements that tell the browser to perform early actions (like DNS lookups, TCP handshakes, or pre-fetching) before they are strictly needed. They help improve perceived page load performance by warming up connections or preloading critical assets.

Preload fetches a resource for the current navigation with high priority. It’s great for fonts, above-the-fold images, or critical CSS/JS. Prefetch fetches a resource that might be needed for future navigations (low priority). Use preload for now, prefetch for next pages.

Use dns-prefetch to resolve a domain early (lightweight). Use preconnect when you also need the TCP and TLS handshake completed ahead of time. Preconnect is more resource-intensive; save it for critical third‑party origins (like your CDN or API).

If you preload a CORS-enabled resource (like fonts from Google Fonts), you must set crossorigin="anonymous" (or use-credentials) to match the eventual request. Otherwise the browser may fetch the resource twice, wasting bandwidth.

Yes – for example, a preconnect to a CDN origin combined with a preload for a specific font file from that CDN. Avoid redundant hints, though; a single preconnect already covers DNS resolution, making an extra dns-prefetch unnecessary.

All modern browsers (Chrome, Firefox, Safari, Edge) support preload, prefetch, preconnect, and dns-prefetch. However, always check caniuse.com for the latest compatibility details, especially for preload nuances.
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