Core Web Vitals and conversion diagnostics, together
Most speed tools stop at a technical score. This one connects Core Web Vitals to what actually affects conversion — mobile speed, form friction, and above-the-fold clarity — in one report.
Mobile LCP is the main Core Web Vitals issue, driven by an unoptimized hero image — compressing it is likely your fastest performance win.
Why this tool exists
Site speed and conversion are usually diagnosed separately — a Core Web Vitals score from one tool, a conversion audit from another — even though a slow site is frequently the actual cause of a conversion problem nobody's connected back to performance.
Standard speed tests report Core Web Vitals in isolation, often on desktop by default, even though mobile rendering is what search engines actually evaluate and where most real-world friction shows up for visitors.
This analyzer checks mobile-specific Core Web Vitals and pairs them with conversion-relevant diagnostics — form friction, above-the-fold clarity — so a slow LCP and a leaking signup form show up in the same report, connected to the same root cause where relevant.
- A clear read on your mobile Core Web Vitals, not just desktop
- Conversion-relevant diagnostics alongside technical performance
- A specific, prioritized fix instead of a raw technical score
- A connection drawn between speed issues and conversion impact
Who it's for
Built for anyone whose site's speed and conversion problems have never been diagnosed together.
Need to know if site speed is costing conversions, not just rankings.
Need a fast technical health check without hiring a developer first.
Need a prioritized list connecting technical issues to business impact.
Need a combined technical and conversion diagnostic for client reporting.
Need checkout and product-page performance specifically checked.
Need signup and trial form friction connected to page performance.
Need mobile Core Web Vitals as part of a broader technical audit.
Need to rule out a performance cause before testing copy or design.
How it works
From your URL to a combined performance and conversion report.
Paste the page you want analyzed
Mobile Core Web Vitals are measured
Form friction and page clarity are assessed
A connected, prioritized report is delivered
Paste the page you want analyzed
Mobile Core Web Vitals are measured
Form friction and page clarity are assessed
A connected, prioritized report is delivered
Features
Built to connect technical performance to real business impact.
Mobile Core Web Vitals
LCP, INP, and CLS measured on mobile rendering specifically.
Conversion diagnostics
Form friction and completion-rate signals, not just speed.
Above-the-fold clarity check
Whether a visitor can tell what to do within seconds.
Accessibility scoring
Baseline accessibility signals included in the same report.
Prioritized fix list
Issues ranked by likely impact, not listed flat.
Exportable report
Share findings with a developer or team directly.
What you'll get
A connected report, not two disconnected technical and conversion scores.
LCP, INP, and CLS measured specifically on mobile.
Form friction and completion signals for key pages.
Whether the page's value and next step are immediately clear.
A baseline WCAG-aligned accessibility read.
The specific issues most likely affecting both rankings and conversion.
See it in action
PreviewA preview of the kind of combined report the tool generates — your results will reflect your actual site.
Mobile LCP is the main Core Web Vitals issue, driven by an unoptimized hero image — compressing it is likely your fastest performance win.
Key benefits
Checks what search engines and most visitors actually experience.
See the business impact of a technical issue, not just a score.
No need to run separate speed and conversion audits.
A ranked fix list your team can act on immediately.
A baseline accessibility check in the same pass.
A real technical and conversion read at no cost.
Use cases
The same analyzer, applied to different diagnostic needs.
No dedicated developer to diagnose why the site feels slow.
Surfaces the specific, prioritized fixes without requiring deep technical expertise.
A clear task list a generalist or freelancer can act on.
Trial signups are lower than expected and the cause is unclear.
Checks whether page speed or form friction is contributing.
Rules performance in or out before testing copy or design changes.
Needs a combined technical and conversion diagnostic for client reporting.
Generates one connected report instead of two separate audits.
A clearer, more actionable deliverable for the client.
Needs to prioritize a long backlog of potential site fixes.
Ranks issues by likely impact on both rankings and conversion.
A defensible priority order for limited engineering time.
Checkout completion rate has been declining.
Checks checkout-specific performance and form friction directly.
Identifies whether a technical regression is driving the decline.
The AI behind the tool
The analyzer measures mobile-specific Core Web Vitals and pairs them with conversion-relevant signals — form structure, above-the-fold content clarity — gathered from the same page load, so both diagnoses reflect the same real user experience.
Prioritization weighs likely business impact, not just technical severity — a moderate speed issue on a high-traffic checkout page ranks above a more severe issue on a rarely-visited page.
Where a technical and conversion issue are likely connected — a slow-loading form field, for instance — the report surfaces that connection explicitly rather than listing them as unrelated findings.
Mobile Core Web Vitals plus form and page-clarity conversion signals.
By likely business impact, not just technical severity.
Related speed and conversion issues are surfaced together, not separately.
Frequently asked questions
Related resources
Go deeper on the frameworks behind site performance and conversion.
Ready to see what's slowing down your site — and your conversions?
Be first to know when the Website Performance Analyzer launches — or start diagnosing today with the Analytics & CRO guide.