Performance toolkit
Website Speed & Mobile Performance Tools
Fast, stable and usable pages reduce friction for visitors. These performance tools combine PageSpeed diagnostics with public mobile, responsiveness and accessibility checks so you can prioritise the next practical fix.
Suggested workflow
- 1Run Website Speed Audit for a focused PageSpeed and Lighthouse performance view.
- 2Use Core Web Vitals and Mobile-Friendly Checker to investigate experience risks.
- 3Validate important changes on a real device and compare the published result with real-user data when available.
Tools in this collection
performance
Website Speed & Performance Audit
Audit website speed and performance signals.
Open toolperformance
Core Web Vitals Checker
Review LCP, INP and CLS-related performance signals.
Open toolperformance
Mobile-Friendly Checker
Audit mobile usability and responsive-page signals.
Open toolperformance
Mobile Lead & UX Audit
Audit mobile viewport, readability, and form usability.
Open toolperformance
Accessibility Checker
WCAG compliance and accessibility analysis.
Open toolseo
Image SEO Checker
Check image alt text, layout shift dimensions, and modern formats.
Open toolWebsite Speed & Mobile Performance Tools FAQs
What are Core Web Vitals?
Core Web Vitals are user-experience metrics that describe loading, responsiveness and visual stability. They should be interpreted alongside the page purpose and real-user experience.
Is a perfect PageSpeed score required?
No. A useful goal is to remove the largest visitor-facing bottlenecks and maintain a reliable experience across real devices and connections.
Why should I test mobile separately?
Mobile users often have smaller screens, touch input and more varied network conditions, so a page can work well on desktop while still creating friction on phones.
Use each result as a starting point, then validate important changes on the published website.