What are Core Web Vitals?

Core Web Vitals are a set of three metrics (LCP, CLS, FID/INP) that Google uses to measure real-world user experience. They are part of the Page Experience signals and directly impact search rankings.

How do Core Web Vitals affect SEO?

Google uses Core Web Vitals as a ranking signal. Pages that meet the "Good" thresholds receive a ranking boost, while poor scores can cause pages to rank lower than competitors with better user experience.

What is the difference between FID and INP?

FID (First Input Delay) measures only the first interaction delay. INP (Interaction to Next Paint) measures responsiveness across all interactions throughout the page lifecycle. INP replaced FID as a Core Web Vital in March 2024.

How can I improve my Core Web Vitals?

Key improvements include: optimizing images (WebP, lazy loading), reducing JavaScript execution time, minimizing layout shifts (set image dimensions, avoid injecting content), and improving server response time (CDN, caching).

How often should I test Core Web Vitals?

Test during major changes (new features, design updates, migrations) and at least monthly for monitoring. Real User Monitoring (RUM) data from Chrome UX Report provides continuous insights.

Can I fake good Core Web Vitals scores?

Google uses real user data from Chrome for ranking decisions, not lab data. Manipulating lab results won't help your rankings. Focus on genuine performance improvements for real users.

Do Core Web Vitals matter for all pages?

Core Web Vitals apply page-level, not domain-level. Each page is evaluated independently. Your highest-traffic pages benefit most from optimization, as they generate the most user experience signals.

Performance Analyzer v1.0

Every vital,measured for every ranking.

Measure LCP, CLS, FID, FCP, TTFB, and INP. Get your Core Web Vitals score with actionable recommendations.

FREE

Vitals measured

Score scale

Live page data

0/7

Free to run

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#largest contentful paint#cumulative layout shift#interaction to next paint#first input delay#crux report#performance score#render delay#visual stability#responsiveness#loading speed#largest contentful paint#cumulative layout shift#interaction to next paint#first input delay#crux report#performance score#render delay#visual stability#responsiveness#loading speed

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Vitals grading engine

LCP, CLS, INP —
graded like Google does.

Field-aligned assessment of loading, stability and responsiveness with the exact offenders behind each metric and the fix that moves it.

LCP · loading

Largest Contentful Paint against the 2.5s bar — hero candidates and what delays them.

LCPhero2.5spreload

benchmarkseconds

CLS · stability

Cumulative Layout Shift against 0.1 — unsized media, injected content and font swaps.

CLSshiftssizing0.1

benchmarkshift score

INP · responsiveness

Interaction to Next Paint against 200ms — the long tasks and handlers that freeze taps.

INPtaskshandlers200ms

benchmarkmilliseconds

Asset offenders

The specific images, fonts and embeds most responsible for each vitals miss.

imagesfontsembedsoffenders

benchmarkper-asset

Main-thread load

JavaScript execution competing with interactions — long-task inventory included.

JSlong-tasksthreadyield

benchmarkms blocked

Pass trajectory

Which metric to fix first for the fastest path to all-green across the site.

prioritypathgreenplan

benchmarkfix order

How it works

From URL to vitals verdict fast.

Three metrics, zero ambiguity — what passes, what fails, and the ordered path to all-green.

Step 01

Enter your URL

Any public page. We assess the markers behind each Core Web Vital.

5 seconds

Step 02

Three metrics graded

LCP, CLS and INP each get a pass / needs-work / fail verdict with margins.

3 verdicts

Step 03

Offenders named

The exact assets, scripts and layout culprits behind each miss — no generic advice.

named culprits

Step 04

Fix in order

Work the priority queue, redeploy, and re-run until the board is green.

all-green

Vitals, decoded

Three metrics run modern SEO.

Google folds vitals into ranking and UX alike. Master each metric's mechanics and the fixes compound.

Win the hero race

LCP measures when the main content appears. Server latency, hero images and render-blocking are the usual suspects.

Hero-element identification
Preload and fetchpriority plan
Server-latency budget check

Dimension benchmark85/100

preloaded heroes cut LCP by 30%+ typically

Why Amaris vs. the rest

Capability

Amaris

Generic

Manual

LCP / CLS / INP verdicts together

Named offenders per metric

Fixes ordered by vitals lift

Instant free re-runs

No signup or setup

Real-user CrUX field data

Grade your vitals now

Free · Instant · No signup

Green board, higher ranks

Vitals are a ranking system. Pass it.

Grade LCP, CLS and INP together, fix offenders in order, and hold the green board with re-runs.

Grade your vitals now Talk to an expert

Free · No signup · Three-metric verdict

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