Scores and lab metrics
Review performance scores with Core Web Vitals lab signals such as LCP, CLS, INP, FCP and TBT where available.
Core Web Vitals audit with evidence and next steps
Review lab-based Core Web Vitals signals alongside screenshots, performance evidence and fix priorities for mobile and desktop.
Short answer
A Core Web Vitals audit checks loading speed, visual stability and responsiveness signals in a controlled lab run. ViewMend shows the metric values beside screenshots and audit evidence so you can decide what to investigate first. These are lab metrics, not a guarantee of real-user field data.
Why this matters
Vitals need context
A metric value is useful, but teams still need to know what caused it, whether it appears on mobile or desktop, and which work should come first.
Screenshots and evidence
Use screenshots, filmstrip frames and technical audit evidence to understand what users may experience during loading.
Prioritized fixes
See which findings are likely to matter first, then turn them into AI explanations, fix plans or developer-ready tasks.
How it works
Check vitals without losing the evidence
- Enter a public page URL.
- Run a lab-based performance check for mobile and desktop.
- Review scores, Core Web Vitals lab metrics, screenshots and technical evidence.
- Focus on the findings ViewMend prioritizes first.
- Use ViewMend AI only when you want an explanation, fix plan or developer task.
- Retest the public page after changes so the next report reflects the new page state.
Product workflow
Turn vitals into focused work
Use the report to identify likely causes first. Add AI only when you need a plain-language explanation or a developer-ready task.
Fix priorities
Core Web Vitals issues to investigate
| Metric | What it indicates | What to check first |
|---|---|---|
| Poor LCP | Users may wait too long for the main content. | Inspect the LCP element, image delivery, server timing and blocking CSS. |
| High CLS | Unexpected layout movement can hurt perceived quality. | Set dimensions, reserve dynamic areas and avoid late-loading layout changes. |
| Interaction delays | Heavy main-thread work can make input feel slow. | Break long tasks and reduce non-critical JavaScript. |
FAQ
Common questions
What Core Web Vitals does ViewMend show?
ViewMend surfaces lab signals such as LCP, CLS, INP, FCP and TBT where the provider response includes them.
Are these lab metrics or field data?
ViewMend reports lab-based metrics. Field data requires enough real-user data and is not claimed unless available.
Why can results differ between runs?
Lab runs can vary because of network conditions, page changes, third-party scripts and server timing.
What should I fix first?
Start with the findings that affect major content, layout stability and interaction responsiveness.
Can AI help explain Core Web Vitals?
Yes. ViewMend AI can explain findings or create a fix plan when you explicitly request it.