---
title: "Core Web Vitals Test - Free CWV Checker · Unlighthouse"
canonical_url: "https://unlighthouse.dev/tools/cwv-checker"
last_updated: "2026-07-05T10:26:35.882Z"
meta:
  description: "Check if your page passes Google's Core Web Vitals. Test LCP, CLS, and INP with lab and real user data. Free tool with actionable recommendations."
  "og:description": "Check if your page passes Google's Core Web Vitals. Test LCP, CLS, and INP with lab and real user data. Free tool with actionable recommendations."
  "og:title": "Core Web Vitals Test - Free CWV Checker · Unlighthouse"
---

```

Unlighthouse on GitHub

# **Core Web Vitals **Test

Check if your page passes Google's Core Web Vitals with lab and real user data.

**Core Web Vitals Assessment**

Enter a URL to check Core Web Vitals

## **Frequently Asked Questions **

<details>

<summary>**01**### **What are Core Web Vitals?**

</summary>

Core Web Vitals are three metrics Google uses to measure user experience: LCP (loading speed), CLS (visual stability), and INP (interactivity). They are a confirmed ranking factor in Google Search.

</details>

<details>

<summary>**02**### **What is a good Core Web Vitals score?**

</summary>

Good scores are: LCP under 2.5 seconds, CLS under 0.1, and INP under 200 milliseconds. To pass Core Web Vitals, at least 75% of page loads must meet the "good" threshold for all three metrics.

</details>

<details>

<summary>**03**### **What's the difference between Lab and Field data?**

</summary>

Lab data is collected in a controlled environment (Lighthouse). Field data is from real users via the Chrome User Experience Report (CrUX). Field data is what Google uses for ranking, but lab data helps diagnose issues.

</details>

<details>

<summary>**04**### **Do Core Web Vitals affect SEO?**

</summary>

Yes. Core Web Vitals are a confirmed Google ranking factor as part of page experience signals. Pages that pass CWV may have a ranking advantage over those that don't, especially for competitive queries.

</details>

### **Optimize Your Core Web Vitals **

[**Fix LCP **](https://unlighthouse.dev/learn-lighthouse/lcp) [** Fix CLS **](https://unlighthouse.dev/learn-lighthouse/cls) [** Fix INP **](https://unlighthouse.dev/learn-lighthouse/inp) [** Full Guide **](https://unlighthouse.dev/learn-lighthouse/core-web-vitals)