Before you begin

Use the Core Web Vitals Input Assessment as a preparation step: enter reviewed source values, compare the output with your real objective, and keep a dated copy when the result informs a decision.

The interface uses only the values supplied in the browser. It does not query live rankings, traffic, search volume, advertising accounts, or analytics services.

How the Core Web Vitals Input Assessment works

Classify user-entered LCP, INP, and CLS measurements against stored good/needs-improvement/poor reference thresholds.

Planning labels: Advanced level; High / Competitive editorial opportunity. Editorial planning label only — not live Google keyword difficulty, search volume, rank probability, or Google Ads competition.

Method

Uses stored references: LCP good ≤2.5s/poor >4s, INP good ≤200ms/poor >500ms, CLS good ≤0.1/poor >0.25. Confirm current official guidance.

Example

LCP 2.3s, INP 180ms, and CLS 0.08 are each classified Good by the stored references.

Practical uses

Create a transparent first-pass result without sending inputs to a remote service.

Compare alternatives and spot issues before publishing or spending budget.

Copy or download the output, then review it against your real website and campaign goals.

Frequently asked questions

Does the Core Web Vitals Input Assessment use live Google or advertising data?

No. The tool works only with the values you enter. It does not crawl websites, query search volume, connect to ad accounts, or claim to know live rankings.

Are my inputs uploaded or stored?

No. The calculation or text transformation runs locally in your browser. This tool does not submit its form values to the website.

Should I publish the output without review?

Review every output in context. Platform rules, technical configurations, campaign attribution, legal requirements, and business assumptions can change the correct implementation.