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Why is my website slow?

Last reviewed
2026-09-16

Large images, third-party scripts, frontend code and slow server responses can all affect speed. Start by measuring the pages and tasks visitors actually use, then identify the largest delays.

The longer version

Image dimensions and formats, font loading, scripts and embedded tools all affect the work a browser needs to do. Server response time and caching also matter, especially on dynamic sites.

A network trace can identify large resources and delayed requests. Field measurements show real visitor experience, while lab tests help diagnose specific problems. Use both where available.

Next steps

  1. Measure important pages on representative devices and connections.
  2. Review image sizes, scripts, fonts and server response.
  3. Remove unused tools and optimize the resources causing delays.
  4. Recheck after changes and monitor available field data.

This page provides general information. Your obligations depend on your business and jurisdiction. Consult a qualified adviser about your circumstances.