Phase 1. Performance. Real Core Web Vitals, measured on your live page.

LCP, INP, and CLS, the three metrics Google actually uses to rank your site. SchemaReports measures all three on the live page and tells you exactly which elements are dragging them down. Free audit includes Phase 1 and all 11 other phases.

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Phase 1 Performance. Core Web Vitals on the live page

INP Analysis

Interaction to Next Paint measures responsiveness across the visit

Live measurement

Lab and field metrics, no extension required

Phase 1: Performance

Real Core Web Vitals on the live page, plus resource-by-resource breakdown of what is slowing the site down. Results in 2 to 5 minutes.

LCP measured live, the big paint event
INP measured live, replaced FID March 2024
CLS measured live, layout shift tracking

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LCP, INP, CLS

Three metrics, scored against Google's thresholds

Largest Contentful Paint

Core Web Vitals are three metrics Google uses to measure page experience: LCP (how fast main content loads), INP (how quickly the page responds to user interaction), and CLS (how stable the layout is). Google uses these as ranking signals. Sites that fail Core Web Vitals can lose rankings even if their content is solid.

How long until your main content shows.
INP under 200ms = good, over 500ms = poor
Usually fixed by optimizing hero images and fonts.

Resource breakdown

Image, JS, CSS analyzed file-by-file

Interaction to Next Paint

How responsive your page is to taps and clicks. Target under 200ms. Usually a JavaScript problem. Replaced FID in March 2024.

How responsive your page is to taps and clicks.
Target under 200ms.
Usually a JavaScript problem.

Mobile-first scoring

Tested under throttled mobile network conditions

Cumulative Layout Shift

Mobile is over 60% of web traffic and the slowest experience on most sites. We score mobile Core Web Vitals separately from desktop, simulate slow networks, and flag mobile-specific issues like tap target size and viewport configuration.

How much your layout jumps around while loading.
Target under 0.1.
Usually caused by unoptimized images, ads, or web fonts.

Live page fetch

Not simulated. Not a cache. SchemaReports pulls your live HTML and measures Core Web Vitals the same way Chrome would.

Not simulated.
Not a cache.
SchemaReports pulls your live HTML and measures Core Web Vitals the same way Chrome would.

Element-level identification

When your LCP is slow, the report tells you which element is the LCP candidate. When your CLS is bad, it tells you which element shifted. No guessing.

When your LCP is slow, the report tells you which element is the LCP candidate.
When your CLS is bad, it tells you which element shifted.
No guessing.

Plain-English recommendations

Every finding comes with a specific recommendation. Not improve your performance, actual specific guidance tied to what is wrong.

Every finding comes with a specific recommendation.
Not improve your performance, actual specific guidance tied to what is wrong.

The ZolukoWeb example

First audit on ZolukoWeb caught 400+ images returning 403 errors. The site scored a D on Phase 1. Fixed the images, next audit scored an A.

First audit on ZolukoWeb caught 400+ images returning 403 errors.
The site scored a D on Phase 1.
Fixed the images, next audit scored an A.

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What the Phase 1 report delivers.

Live-measured LCP, INP, CLS with A to F grade Real values from the live page, scored on Google's targets.
Every slow element identified by selector Hand it to your developer with the exact element to fix.
Specific fix recommendations per finding Not generic advice. Tied to your actual page content.
Included on every audit, free or paid Phase 1 runs at every tier.

Your audit deliverable

Score, breakdown, file-level findings, fix list

Performance

CORE WEB VITALS

LCP ? 6.8 s

0s 2.5s 4s+

FCP ? 4.1 s

0s 1.8s 3s+

CLS ? 0.003

0 0.1 0.25+

TBT ? 380 ms

0ms 200ms 600ms+

Common questions about performance auditing

Are these measurements real or simulated?

SchemaReports fetches your live page.
INP measures responsiveness - should be under 200ms

What about FID?

FID was retired by Google in March 2024 and replaced by INP. SchemaReports measures INP.

FID was retired by Google in March 2024 and replaced by INP.
SchemaReports measures INP.

Why is TBT not a Core Web Vital?

TBT is a lab metric. INP is the field metric Google actually ranks on.

TBT is a lab metric.
INP is the field metric Google actually ranks on.

Can I track Performance scores over time?

Yes, on Pro, Multi-Business, or Agency plans with biweekly auto-refresh.

Yes, on Pro, Multi-Business, or Agency plans with biweekly auto-refresh.
Agency plan users can also access reports programmatically via the full API, pull audit data into your reporting stack without manual downloads.

What platform does my site need to run on?

Any. Phase 1 works on WordPress, Webflow, Shopify, custom builds, everything.

Phase 1 works on WordPress, Webflow, Shopify, custom builds, everything.
Subscriptions can be cancelled at any time. There are no long-term contracts. Access continues through the end of your current billing period after cancellation.

A public API is on the roadmap. Today every audit exports as PDF, Markdown, and JSON on every plan for manual integration.
API documentation is available after account creation. Use it to run audits programmatically, retrieve structured results, and integrate SchemaReports data into your client reporting stack.

Run Free Audit

Run Your Free Audit

Run a real performance audit on your site

Free, 2 to 5 minutes. Core Web Vitals scoring, resource analysis, and prioritized fixes.

The only audit that checks Psychology, Trust, and AI Readiness
12 phases, 1,000+ data points, results in under 5 minutes
Free to run, free to download, yours to keep forever

Run free 12-phase audit See pricing

Find out where your Core Web Vitals stand

Phase 1 of 12

Performance is the foundation