---
title: "Bulk Core Web Vitals Test - Compare CWV Across Sites · Unlighthouse"
canonical_url: "https://unlighthouse.dev/tools/cwv-compare"
last_updated: "2026-06-30T08:48:13.503Z"
meta:
  description: "Bulk test and compare Core Web Vitals across multiple websites. See how your LCP, CLS, and INP stack up against competitors with real Chrome user data."
  "og:description": "Bulk test and compare Core Web Vitals across multiple websites. See how your LCP, CLS, and INP stack up against competitors with real Chrome user data."
  "og:title": "Bulk Core Web Vitals Test - Compare CWV Across Sites · Unlighthouse"
---

</h1>

```

Unlighthouse on GitHub

# **CWV **Compare

**Pit your site against competitors. Real Chrome user data. Clear winners. **

**Core Web Vitals Comparison**• Field data from real Chrome users

**CrUX **

**Enter domains to compare **

Compare 2-4 sites using real Chrome user data

## **Frequently Asked Questions **

<details>

<summary>**01**### **What data is being compared?**

</summary>

This tool compares real user performance data from the Chrome User Experience Report (CrUX). It shows P75 values—the experience of 75% of your users.

</details>

<details>

<summary>**02**### **Why is there no data for a site?**

</summary>

Sites need sufficient Chrome traffic to appear in CrUX. New sites, low-traffic sites, or sites blocking data collection won't have field data available.

</details>

<details>

<summary>**03**### **How is the winner determined?**

</summary>

For each metric, the site with the lowest (fastest/best) P75 value wins. Overall winner prioritizes Core Web Vitals pass rate, then combined metric performance.

</details>

<details>

<summary>**04**### **Can I share this comparison?**

</summary>

Yes! The URL updates as you compare sites. Copy and share the URL to show others the same comparison results.

</details>

### **Improve 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)