---
title: "Free Lighthouse & Core Web Vitals Tools · Unlighthouse"
canonical_url: "https://unlighthouse.dev/tools"
last_updated: "2026-06-30T08:47:46.077Z"
meta:
  description: "Free bulk Core Web Vitals checker, Lighthouse score calculator, CLS debugger, LCP finder, and more. Test multiple pages at once with no signup."
  "og:description": "Free bulk Core Web Vitals checker, Lighthouse score calculator, CLS debugger, LCP finder, and more. Test multiple pages at once with no signup."
  "og:title": "Free Lighthouse & Core Web Vitals Tools · Unlighthouse"
---

</h1>

```

Unlighthouse on GitHub

# **Performance **Tools

Free interactive tools to understand and improve your Lighthouse scores.

[<h2>**Bulk PageSpeed Test**</h2>Test up to 10 URLs at once with PageSpeed Insights. Get performance scores for multiple pages in one batch.**Batch Testing****Performance****Core Web Vitals**](https://unlighthouse.dev/tools/bulk-pagespeed) [<h2>**Core Web Vitals Checker**</h2>Check if your page passes Google's Core Web Vitals. Test LCP, CLS, and INP with lab and real user data.**LCP****CLS****INP****Core Web Vitals**](https://unlighthouse.dev/tools/cwv-checker) [<h2>**Core Web Vitals History**</h2>Track real user performance over 25 weeks. See how your LCP, CLS, and INP trends change over time with CrUX data.**Field Data****Trends****CrUX**](https://unlighthouse.dev/tools/cwv-history) [<h2>**TTFB Checker**</h2>Test Time to First Byte with real Chrome user data. Compare field vs lab TTFB and track server response trends.**TTFB****Server Response****CrUX**](https://unlighthouse.dev/tools/ttfb-checker) [<h2>**CWV Compare**</h2>Compare Core Web Vitals across multiple websites. Benchmark your site against competitors with real Chrome user data.**Competitor Analysis****CrUX****Benchmarking**](https://unlighthouse.dev/tools/cwv-compare) [<h2>**Lighthouse Report Viewer**</h2>Upload your Lighthouse JSON report to visualize scores, metrics, and audits interactively.**All Categories****Audits****Metrics**](https://unlighthouse.dev/tools/lighthouse-report-viewer) [<h2>**Lighthouse Score Calculator**</h2>Calculate your performance score interactively. Adjust metrics to see how they impact your overall Lighthouse score.**FCP****SI****LCP****TBT****CLS**](https://unlighthouse.dev/tools/lighthouse-score-calculator) [<h2>**LCP Element Finder**</h2>Identify which element is your Largest Contentful Paint and get actionable recommendations to improve it.**LCP****Core Web Vital**](https://unlighthouse.dev/tools/lcp-finder) [<h2>**INP Analyzer**</h2>Analyze Interaction to Next Paint issues. Find slow event handlers and optimize responsiveness.**INP****Core Web Vital**](https://unlighthouse.dev/tools/inp-analyzer) [<h2>**CLS Debugger**</h2>Debug Cumulative Layout Shift issues. Identify elements causing unexpected layout shifts.**CLS****Core Web Vital**](https://unlighthouse.dev/tools/cls-debugger) [<h2>**HAR File Viewer**</h2>Analyze HTTP Archive files with network waterfall, request timing, resource breakdown, and protocol distribution. Entirely client-side.**Network Waterfall****Request Analysis****Performance**](https://unlighthouse.dev/tools/har-viewer) [<h2>**JSON Size Analyzer**</h2>Calculate JSON payload size with minification savings, gzip/brotli estimates, key contributions, and duplicate key analysis. Entirely client-side.**Size Analysis****Minification****Compression**](https://unlighthouse.dev/tools/json-size) [<h2>**Page Size Checker**</h2>Test page weight with resource breakdown, third-party analysis, unused code detection, and HTTP Archive percentile comparison.**Page Weight****Resources****Third Parties**](https://unlighthouse.dev/tools/page-size) [<h2>**PageSpeed Insights Performance**</h2>Get detailed PageSpeed Insights performance data with field and lab metrics.**Performance****Field Data**](https://unlighthouse.dev/tools/pagespeed-insights-performance)