Free website speed checker for performance and SEO diagnostics
A fast website is easier to use, easier to crawl and more likely to keep visitors moving toward the next action. This checker combines a real public server request with practical page diagnostics and, when Google returns data, mobile and desktop Lighthouse signals.
Use the report to separate server-response problems from front-end performance issues. TTFB, downloaded HTML size, compression and cache headers help diagnose the delivery layer, while Lighthouse scores can highlight rendering, accessibility and search-quality issues that need deeper work.
How to use it
- Enter the full public website URL you want to test.
- Review live server timing, status, response size and delivery signals.
- Compare mobile and desktop Lighthouse data when it is available.
- Use the recommendations to prioritise hosting, code, media and front-end improvements.