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Preload Preconnect Hint Generator

Delivery hints

Preload Preconnect Hint Generator

Paste a list of fonts, CDN origins, and critical images. The generator builds preload, preconnect, and dns-prefetch tags, and warns when too many preloads would compete with first paint.

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Resources

One URL per line. Optional prefixes: font, image, style, script, origin. Relative paths are treated as first-party.

Page origin (optional)

Hints are generated in this browser. URLs are not uploaded.

Hint checks

Preload only a few critical files. Use preconnect for third-party origins, especially font CDNs.

Paste URLs or load the example.

HTML for the document head

Place these tags early in the document head. Font preloads already include crossorigin.

Link header

Optional HTTP Link header if your CDN or origin can send hints before HTML.

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Only query what is needed

Network diagnostics use the domain, URL, or IP you enter to run the requested check and show actionable results.

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Quick workflow

Enter a domain, URL, IP address, or DNS value.
Run the check and review warnings or records.
Use the suggested follow-up tools to verify related settings.

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Useful tip

For DNS changes, check records first, then propagation, and finally related email or SSL settings.

Suggested next steps

Continue with tools that often pair well with this task.

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Next step

Resource Hint Conflict Checker

Paste the document head to find duplicate, unused, and mismatched preload or preconnect hints locally.

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Next step

Font Loading CSS Advisor

Paste font CSS or HTML and get local advice for preload, font-display, WOFF2, and subsetting before launch.

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Next step

Above The Fold Asset Checklist

Inventory first-view CSS, fonts, images, and scripts, then score render-blocking and LCP risks locally before publish.

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Next step

Hero Image LCP Estimator

Upload a hero image or enter dimensions to estimate display pixels, file size, transfer time, and compression targets locally.

Luck predicts what you like

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