# Unlighthouse

> Google Lighthouse for your entire site.

Canonical Origin: https://unlighthouse.dev

## LLM Resources

- [Full Content](https://unlighthouse.dev/llms-full.txt)
  Complete page content in markdown format.
- [MCP](https://unlighthouse.dev/mcp)
  Model Context Protocol server endpoint for AI agent integration.
- [sitemap.xml](/sitemap.xml)
  XML sitemap for search engines and crawlers.
- [robots.txt](/robots.txt)
  Crawler rules and permissions.

## Pages

- [Unlighthouse](/): Google Lighthouse for your entire site.
- [Admin · Unlighthouse](/admin): Google Lighthouse for your entire site.
- [Integration Deprecations · Unlighthouse](/integration-deprecations): Build tool integrations are deprecated in v1.0. Learn about migration paths and alternatives.
- [Releases · Unlighthouse](/releases): Google Lighthouse for your entire site.

- [Web Performance Glossary · Unlighthouse](/glossary): Definitions and explanations of Core Web Vitals, Lighthouse metrics, and web performance terminology.
- [What is Cumulative Layout Shift (CLS)? · Unlighthouse](/glossary/cls): CLS measures visual stability. Learn what it is, thresholds, and how to prevent layout shifts.
- [What is First Contentful Paint (FCP)? · Unlighthouse](/glossary/fcp): FCP measures when the first content renders. Learn what it is, thresholds, and how to improve it.
- [What is Interaction to Next Paint (INP)? · Unlighthouse](/glossary/inp): INP measures responsiveness. Learn what it is, thresholds, and how to improve interaction speed.
- [What is Largest Contentful Paint (LCP)? · Unlighthouse](/glossary/lcp): LCP measures loading performance. Learn what it is, thresholds, and how to improve your score.
- [What is Speed Index? · Unlighthouse](/glossary/speed-index): Speed Index measures visual loading progress. Learn what it is, thresholds, and how to improve it.
- [What is Total Blocking Time (TBT)? · Unlighthouse](/glossary/tbt): TBT measures main thread blocking during load. Learn what it is, thresholds, and how to reduce blocking time.
- [What is Time to First Byte (TTFB)? · Unlighthouse](/glossary/ttfb): TTFB measures server response time. Learn what it is, thresholds, and how to optimize it.
- [What is Time to Interactive (TTI)? · Unlighthouse](/glossary/tti): TTI measured page interactivity but was deprecated in Lighthouse 10. Learn what replaced it.

- [How Unlighthouse Works · Unlighthouse](/guide/getting-started/how-it-works): Learn how Unlighthouse automatically discovers pages, runs Lighthouse audits in parallel, and generates site-wide performance reports.
- [Unlighthouse CLI - Site-Wide Lighthouse · Unlighthouse](/guide/getting-started/installation): Install and run Unlighthouse CLI to scan your entire website with Lighthouse. npm, pnpm, and yarn installation options.
- [Integrations · Unlighthouse](/guide/getting-started/integrations): Integrate Unlighthouse into your existing build tools, frameworks, and CI/CD pipelines for automated Lighthouse testing.

- [Authentication for Lighthouse Scans · Unlighthouse](/guide/guides/authentication): Scan password-protected websites with Unlighthouse. Configure basic auth, cookies, headers, localStorage, and programmatic login flows.
- [Chrome Dependency · Unlighthouse](/guide/guides/chrome-dependency): Configure Chrome browser settings for Unlighthouse scanning, including system Chrome usage and custom installations.
- [Common Errors · Unlighthouse](/guide/guides/common-errors): Troubleshoot common issues encountered when running Unlighthouse scans, including browser connection and environment problems.
- [Configuration · Unlighthouse](/guide/guides/config): Configure Unlighthouse for your specific needs using configuration files and inline options.
- [Debugging Lighthouse Scans · Unlighthouse](/guide/guides/debugging): Debug and troubleshoot Unlighthouse scans using logging, browser inspection, and diagnostic tools.
- [Device Configuration · Unlighthouse](/guide/guides/device): Configure device emulation settings for mobile and desktop scanning with custom dimensions and throttling options.
- [Run Lighthouse in Docker · Unlighthouse](/guide/guides/docker): Run Unlighthouse site-wide Lighthouse scans in Docker containers. Dockerfile examples and CI/CD configuration.
- [Dynamic Sampling · Unlighthouse](/guide/guides/dynamic-sampling): Automatically sample similar pages to reduce scan time for sites with many similar URLs like blogs or e-commerce.
- [Generate Lighthouse Reports · Unlighthouse](/guide/guides/generating-static-reports): Generate static Lighthouse reports for your entire site. Export as HTML, CSV, or JSON. Deploy to Netlify, CloudFlare, or any static host.
- [Lighthouse Configuration · Unlighthouse](/guide/guides/lighthouse): Customize Google Lighthouse audit settings, categories, and performance thresholds within Unlighthouse scans.
- [Puppeteer Launch Options · Unlighthouse](/guide/guides/puppeteer): Configure Puppeteer launch options in Unlighthouse: headless mode, Chrome args, viewport settings, executable path, and navigation hooks.
- [Route Definitions · Unlighthouse](/guide/guides/route-definitions): Configure route discovery and custom sampling patterns for better page organization and intelligent scanning.
- [URL Discovery · Unlighthouse](/guide/guides/url-discovery): How Unlighthouse discovers pages using sitemaps, robots.txt, and internal link crawling. Configure URL sources and filters.
- [Customizing the UI · Unlighthouse](/guide/recipes/client): Modify Unlighthouse client interface columns and display to show custom metrics and data.
- [Improving Lighthouse Accuracy · Unlighthouse](/guide/recipes/improving-accuracy): Optimize Lighthouse scan accuracy with multiple samples and reduced concurrency for more reliable, consistent Core Web Vitals results.
- [Bulk Lighthouse Testing for Large Sites · Unlighthouse](/guide/recipes/large-sites): Scan large websites with thousands of pages efficiently. Configure sampling, URL filtering, and optimization strategies for bulk Lighthouse testing.
- [Single-Page Applications · Unlighthouse](/guide/recipes/spa): Configure Unlighthouse to scan single-page applications (SPAs) with client-side routing like React, Vue, and Angular apps.
- [Lighthouse CI Integration · Unlighthouse](/integrations/ci): Run Lighthouse CI on your entire site. Automate site-wide audits in GitHub Actions, GitLab CI, and any CI/CD pipeline with budget assertions.
- [Lighthouse CLI for Entire Sites · Unlighthouse](/integrations/cli): Scan your entire website with Lighthouse from the command line. Alternative to lighthouse CLI that audits all pages automatically.
- [Nuxt Integration · Unlighthouse](/integrations/nuxt): Integrate Lighthouse audits directly into your Nuxt development workflow with automatic route discovery.
- [Vite Integration · Unlighthouse](/integrations/vite): Integrate Lighthouse audits into your Vite development server with automatic route discovery and HMR support.
- [Webpack Integration · Unlighthouse](/integrations/webpack): Add Lighthouse auditing to webpack-based projects with development server integration and HMR support.
- [Learn Google Lighthouse & Core Web Vitals · Unlighthouse](/learn-lighthouse): Guides and tutorials for improving your site's Core Web Vitals and performance. Master LCP, CLS, and INP with actionable fixes.
- [Bulk Lighthouse Testing Guide | Unlighthouse · Unlighthouse](/learn-lighthouse/bulk-lighthouse-testing): How to run Lighthouse audits across your entire website. Test hundreds of pages automatically.
- [The Complete Core Web Vitals Guide · Unlighthouse](/learn-lighthouse/core-web-vitals): Master Core Web Vitals - Google's page experience metrics. Learn LCP, CLS, INP thresholds, how to measure them, and fixes that improve rankings and conversions.
- [Lighthouse Accessibility Audit Guide · Unlighthouse](/learn-lighthouse/accessibility): Master web accessibility with Lighthouse. Learn how accessibility audits work, why they matter for users and SEO, and how to fix common issues.
- [Fix Focusable Elements Inside aria-hidden · Unlighthouse](/learn-lighthouse/accessibility/aria-hidden-focus): Learn how to fix aria-hidden-focus issues in Lighthouse accessibility audits
- [Fix Missing Required ARIA Attributes · Unlighthouse](/learn-lighthouse/accessibility/aria-required-attr): Learn how to fix aria-required-attr issues in Lighthouse accessibility audits
- [Fix Invalid or Misspelled ARIA Attributes · Unlighthouse](/learn-lighthouse/accessibility/aria-valid-attr): Learn how to fix aria-valid-attr issues in Lighthouse accessibility audits
- [Fix Buttons Without Accessible Names for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/button-name): Learn how to fix buttons without accessible names in Lighthouse accessibility audits
- [Fix Missing Bypass Blocks for Keyboard Navigation · Unlighthouse](/learn-lighthouse/accessibility/bypass): Learn how to fix bypass issues in Lighthouse accessibility audits
- [Fix Color Contrast for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/color-contrast): Learn how to fix color contrast issues in Lighthouse accessibility audits
- [Fix Missing Document Title for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/document-title): Learn how to fix missing document title in Lighthouse accessibility audits. The title gives screen reader users an overview of the page.
- [Fix Frame Title for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/frame-title): Learn how to fix frame and iframe title issues in Lighthouse accessibility audits
- [Fix Heading Order for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/heading-order): Learn how to fix heading order issues in Lighthouse accessibility audits. Properly ordered headings convey semantic structure for easier navigation.
- [Fix Missing HTML Lang Attribute for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/html-has-lang): Learn how to fix missing lang attribute in Lighthouse accessibility audits. The lang attribute helps screen readers pronounce content correctly.
- [Fix Missing Image Alt Text for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/image-alt): Learn how to fix missing image alt attributes in Lighthouse accessibility audits
- [Fix Form Labels for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/label): Learn how to fix missing form labels in Lighthouse accessibility audits. Labels ensure form controls are announced properly by assistive technologies.
- [Fix Links Without Discernible Names for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/link-name): Learn how to fix links without discernible names in Lighthouse accessibility audits
- [Fix Meta Viewport Zoom Restrictions for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/meta-viewport): Learn how to fix meta viewport zoom restrictions in Lighthouse accessibility audits
- [Fix Tabindex Values Greater Than Zero for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/tabindex): Learn how to fix tabindex values greater than zero in Lighthouse accessibility audits
- [Fix Touch Target Size for Better Accessibility · Unlighthouse](/learn-lighthouse/accessibility/target-size): Learn how to fix touch target size issues in Lighthouse accessibility audits
- [Lighthouse Best Practices Guide · Unlighthouse](/learn-lighthouse/best-practices): Master Lighthouse Best Practices audits. Learn what they measure, why they matter for security and UX, and how to pass every audit.
- [Fix Back/Forward Cache Issues for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/bf-cache): Enable bfcache to make back button navigation instant. Learn common blockers and how to fix them.
- [Fix Charset Declaration for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/charset): Learn how to properly declare character encoding to prevent text rendering issues and security vulnerabilities.
- [Fix Deprecated API Usage for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/deprecations): Identify and replace deprecated browser APIs before they break your site when browsers remove them.
- [Fix Missing HTML Doctype for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/doctype): Learn why your page needs a proper HTML doctype and how quirks mode breaks your layout and CSS.
- [Fix Console Errors for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/errors-in-console): Identify and resolve browser console errors. Clean up JavaScript exceptions, failed network requests, and deprecation warnings affecting your site.
- [Fix Geolocation Request on Page Load · Unlighthouse](/learn-lighthouse/best-practices/geolocation-on-start): Stop requesting geolocation permission on page load. Users distrust sites that ask for location without context - tie requests to user actions instead.
- [Fix Incorrect Image Aspect Ratio for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/image-aspect-ratio): Display images with their natural aspect ratio to prevent distortion. Stretched or squished images look unprofessional.
- [Fix Low Resolution Images for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/image-size-responsive): Serve images with appropriate resolution for the display size and device pixel ratio. Blurry images hurt perceived quality.
- [Fix Chrome DevTools Issues for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/inspector-issues): Resolve browser-detected problems including mixed content, cookie issues, CSP violations, and cross-origin blocks that appear in Chrome's Issues panel.
- [Fix HTTPS Issues for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/is-on-https): Eliminate insecure HTTP requests and mixed content warnings. Learn to enforce HTTPS across your entire site for security and modern web features.
- [Fix Notification Request on Page Load · Unlighthouse](/learn-lighthouse/best-practices/notification-on-start): Stop requesting notification permission on page load. Users dismiss these prompts reflexively - wait for a user action that shows they want notifications.
- [Fix Inputs That Block Pasting · Unlighthouse](/learn-lighthouse/best-practices/paste-preventing-inputs): Stop preventing users from pasting into input fields. Blocking paste breaks password managers and frustrates users without improving security.
- [Fix HTTP to HTTPS Redirect for Better Best Practices Score · Unlighthouse](/learn-lighthouse/best-practices/redirects-http): Configure your server to redirect all HTTP traffic to HTTPS. Protect users and enable secure web features across your entire site.
- [How to Fix Cumulative Layout Shift (CLS) · Unlighthouse](/learn-lighthouse/cls): Fix CLS with actionable techniques. Learn what causes layout shifts, why they hurt SEO and conversions, and how to eliminate them.
- [Fix Ads, Embeds & iframes for Better CLS · Unlighthouse](/learn-lighthouse/cls/ads-embeds-iframes): Prevent layout shifts from third-party ads, video embeds, social widgets, and iframes with reserved space techniques.
- [Fix Animations & Transitions for Better CLS · Unlighthouse](/learn-lighthouse/cls/animations-transitions): Eliminate CLS from animations by using compositor-friendly properties like transform and opacity instead of layout-triggering properties.
- [Fix Dynamic Content Injection for Better CLS · Unlighthouse](/learn-lighthouse/cls/dynamic-content-injection): Stop cookie banners, notifications, and lazy-loaded content from causing layout shifts with space reservation and transforms.
- [Fix Large Layout Shifts for Better CLS · Unlighthouse](/learn-lighthouse/cls/layout-shifts): Identify and eliminate the biggest layout shifts on your page. Diagnose root causes including unsized media, web fonts, and injected iframes.
- [Fix Images Without Dimensions for Better CLS · Unlighthouse](/learn-lighthouse/cls/unsized-images): Images without width and height cause layout shifts. Add explicit dimensions to prevent your page from jumping around as images load.
- [Fix Web Fonts Causing Layout Shifts (FOIT/FOUT) · Unlighthouse](/learn-lighthouse/cls/web-fonts-causing-foit): How to prevent layout shifts from web font loading using font-display, preloading, and fallback metrics.
- [Interaction to Next Paint (INP) Guide · Unlighthouse](/learn-lighthouse/inp): Master INP optimization with practical fixes for JavaScript execution, DOM operations, and event handlers. Improve responsiveness across your site.
- [Fix Excessive DOM Size for Better INP · Unlighthouse](/learn-lighthouse/inp/dom-size): Large DOMs slow every interaction. Reduce DOM size with virtualization, lazy rendering, and smarter component architecture.
- [Fix Event Handler Delays for Better INP · Unlighthouse](/learn-lighthouse/inp/event-handler-delays): Slow event handlers directly hurt INP. Optimize click, input, and keypress handlers for instant feedback.
- [Fix Heavy Main Thread Work for Better INP · Unlighthouse](/learn-lighthouse/inp/heavy-dom-operations): Reduce main thread work from DOM manipulation, style recalculation, and layout thrashing. Keep interactions responsive.
- [Fix Hydration Issues for Better INP · Unlighthouse](/learn-lighthouse/inp/hydration-issues): Framework hydration blocks interactivity. Delay and partial hydration strategies to make SSR sites responsive faster.
- [Fix Long-Running JavaScript for Better INP · Unlighthouse](/learn-lighthouse/inp/long-running-javascript): Reduce JavaScript execution time to improve INP. Learn code splitting, web workers, and task chunking to keep the main thread responsive.
- [Fix Third-Party Script Impact on INP · Unlighthouse](/learn-lighthouse/inp/third-party-scripts): Third-party scripts compete for main thread time. Learn to defer, facade, and limit their impact on interaction responsiveness.
- [Fix Total Blocking Time for Better INP · Unlighthouse](/learn-lighthouse/inp/total-blocking-time): Reduce TBT to improve your Lighthouse performance score. TBT measures main thread blocking - the lab proxy for real-world INP.
- [Largest Contentful Paint (LCP) Guide · Unlighthouse](/learn-lighthouse/lcp): Master LCP optimization. Learn what LCP measures, why it matters for SEO and conversions, and how to fix slow LCP scores with actionable techniques.
- [Fix Client-Side Rendering for Better LCP · Unlighthouse](/learn-lighthouse/lcp/client-side-rendering): How to improve LCP by using server-side rendering or pre-rendering instead of client-side rendering.
- [Fix Large Images for Better LCP · Unlighthouse](/learn-lighthouse/lcp/large-images): Optimize LCP images with responsive srcset, modern formats like WebP and AVIF, and proper compression. Reduce image size without losing quality.
- [Fix Lazy-Loading Above the Fold for Better LCP · Unlighthouse](/learn-lighthouse/lcp/lazy-loading-above-fold): Why you should never lazy-load your LCP image and how to fix it.
- [Fix LCP Lazy Loaded for Better LCP · Unlighthouse](/learn-lighthouse/lcp/lcp-lazy-loaded): Why lazy-loading your LCP image destroys performance and how to fix it. Remove loading="lazy" from above-the-fold images.
- [Fix Prioritize LCP Image for Better LCP · Unlighthouse](/learn-lighthouse/lcp/prioritize-lcp-image): How to prioritize your LCP image with fetchpriority and preload to eliminate resource load delay and improve Core Web Vitals.
- [Fix Page Redirects for Better LCP · Unlighthouse](/learn-lighthouse/lcp/redirects): Eliminate redirect chains that delay LCP. Learn to identify and fix 301/302 redirects, canonical URL issues, and trailing slash mismatches.
- [Fix Render-Blocking Resources for Better LCP · Unlighthouse](/learn-lighthouse/lcp/render-blocking-resources): Eliminate render-blocking CSS and JavaScript to improve LCP. Learn async/defer scripts, critical CSS extraction, and font loading strategies.
- [Fix Resource Load Delay for Better LCP · Unlighthouse](/learn-lighthouse/lcp/resource-load-delay): How to reduce resource load delay by preloading LCP resources and prioritizing critical assets.
- [Fix Slow Server Response (TTFB) for Better LCP · Unlighthouse](/learn-lighthouse/lcp/slow-server-response): Reduce server response time to improve LCP. Learn CDN setup, caching strategies, database optimization, and edge computing solutions.
- [Fix Enormous Network Payloads for Better LCP · Unlighthouse](/learn-lighthouse/lcp/total-byte-weight): How to reduce total page weight and avoid enormous network payloads that slow down your Largest Contentful Paint.
- [Fix Unminified JavaScript for Better LCP · Unlighthouse](/learn-lighthouse/lcp/unminified-javascript): How to minify JavaScript files to reduce payload sizes, improve parse time, and accelerate your Largest Contentful Paint.
- [Fix Unused JavaScript for Better LCP · Unlighthouse](/learn-lighthouse/lcp/unused-javascript): How to reduce unused JavaScript through code splitting, tree shaking, and dynamic imports to improve your Largest Contentful Paint.
- [Lighthouse CI: Automate Performance Testing in CI/CD · Unlighthouse](/learn-lighthouse/lighthouse-ci): Learn how to use @lhci/cli to automate Lighthouse audits on every commit. Prevent performance regressions, enforce budgets, and track metrics over time.
- [Performance Budgets with Lighthouse CI · Unlighthouse](/learn-lighthouse/lighthouse-ci/budgets): Set and enforce web performance budgets using Lighthouse CI assertions. Learn presets, custom thresholds, and budget.json configuration.
- [Lighthouse CI Configuration Reference · Unlighthouse](/learn-lighthouse/lighthouse-ci/configuration): Complete guide to lighthouserc.js configuration options. Covers collect, assert, upload, and server settings for @lhci/cli.
- [Lighthouse CI with GitHub Actions: Complete Setup Guide · Unlighthouse](/learn-lighthouse/lighthouse-ci/github-actions): Step-by-step tutorial for running Lighthouse CI in GitHub Actions. Includes YAML workflows, status checks, and PR comments.
- [Lighthouse CI with GitLab CI/CD: Setup Guide · Unlighthouse](/learn-lighthouse/lighthouse-ci/gitlab-ci): Configure Lighthouse CI for GitLab pipelines. Includes .gitlab-ci.yml examples, merge request integration, and artifact storage.
- [LHCI Server: Self-Host Lighthouse CI Dashboard · Unlighthouse](/learn-lighthouse/lighthouse-ci/server): Deploy your own Lighthouse CI server for historical tracking, build comparisons, and team dashboards. Covers Docker, Heroku, and database setup.
- [Lighthouse CI Troubleshooting Guide · Unlighthouse](/learn-lighthouse/lighthouse-ci/troubleshooting): Fix common Lighthouse CI issues: Chrome launch failures, score variance, shallow clone errors, upload problems, and more.
- [PageSpeed Insights API Guide · Unlighthouse](/learn-lighthouse/pagespeed-insights-api): Complete guide to using the PageSpeed Insights API. Get Lighthouse performance data programmatically with 25,000 free requests per day.
- [Bulk Testing with PageSpeed Insights API · Unlighthouse](/learn-lighthouse/pagespeed-insights-api/bulk-testing): Test multiple URLs with the PageSpeed Insights API. Queue implementation, rate limit handling, and practical limits of bulk PSI testing.
- [Get a PageSpeed Insights API Key · Unlighthouse](/learn-lighthouse/pagespeed-insights-api/get-api-key): Step-by-step guide to getting a free PageSpeed Insights API key from Google Cloud Console. Setup takes 2 minutes.
- [PageSpeed Insights API with Node.js · Unlighthouse](/learn-lighthouse/pagespeed-insights-api/node-example): Fetch Lighthouse performance data with Node.js. Working code examples for the PageSpeed Insights API with TypeScript types.
- [PageSpeed Insights API with Python · Unlighthouse](/learn-lighthouse/pagespeed-insights-api/python-example): Fetch Lighthouse performance data with Python. Working code examples for the PageSpeed Insights API with type hints.
- [PageSpeed Insights API Rate Limits · Unlighthouse](/learn-lighthouse/pagespeed-insights-api/rate-limits): Handle PSI API quotas without breaking your integration. Rate limit detection, retry strategies, and quota monitoring.
- [Lighthouse with Playwright: Performance Testing Guide · Unlighthouse](/learn-lighthouse/playwright): Run Google Lighthouse audits with Playwright for automated performance, accessibility, and SEO testing. Complete setup guide with code examples.
- [Lighthouse on Authenticated Pages with Playwright · Unlighthouse](/learn-lighthouse/playwright/authentication): Run Lighthouse audits on pages behind login. Learn how to preserve authentication state when Lighthouse opens a new browser context.
- [Playwright Lighthouse in GitHub Actions · Unlighthouse](/learn-lighthouse/playwright/ci-cd): Automate Lighthouse audits with Playwright in GitHub Actions. Run performance tests on every PR with thresholds and artifact reports.
- [Troubleshooting Playwright Lighthouse Integration · Unlighthouse](/learn-lighthouse/playwright/troubleshooting): Fix common issues when running Lighthouse with Playwright: port conflicts, authentication problems, flaky scores, and Chrome version mismatches.
- [SEO Audits Guide · Unlighthouse](/learn-lighthouse/seo): Master Lighthouse SEO audits. Understand what each audit checks, why it matters for search visibility, and how to pass every SEO test.
- [Fix Invalid Canonical URL for Better SEO · Unlighthouse](/learn-lighthouse/seo/canonical): Resolve canonical tag errors that cause duplicate content issues and diluted page authority. Learn to implement rel=canonical correctly.
- [Fix Uncrawlable Links for Better SEO · Unlighthouse](/learn-lighthouse/seo/crawlable-anchors): Learn how to fix anchor elements that search engines can't follow due to missing or invalid href attributes.
- [Fix Invalid hreflang Tags for Better International SEO · Unlighthouse](/learn-lighthouse/seo/hreflang): Learn how to fix hreflang validation errors including unexpected language codes and relative URLs in your multi-language site.
- [Fix Unsuccessful HTTP Status Code for Better SEO · Unlighthouse](/learn-lighthouse/seo/http-status-code): Fix pages returning 4xx or 5xx HTTP status codes that prevent proper indexing. Learn status code meanings, common causes, and how to resolve server errors.
- [Fix Page Blocked from Indexing for Better SEO · Unlighthouse](/learn-lighthouse/seo/is-crawlable): Remove crawl blocks preventing search engines from indexing your pages. Fix robots.txt, meta robots, and X-Robots-Tag issues.
- [Fix Non-Descriptive Link Text for Better SEO · Unlighthouse](/learn-lighthouse/seo/link-text): Learn how to replace generic link text like "click here" with descriptive text that helps search engines understand your content.
- [Fix Missing Meta Description for Better SEO · Unlighthouse](/learn-lighthouse/seo/meta-description): Add compelling meta descriptions to improve click-through rates from search results. Learn how to write effective descriptions that drive traffic.
- [Fix Invalid robots.txt for Better SEO · Unlighthouse](/learn-lighthouse/seo/robots-txt): Fix robots.txt validation errors that prevent search engines from properly crawling your site. Learn syntax rules, common errors, and proper configuration.
- [Performance Tools - Lighthouse Calculators & Analyzers · Unlighthouse](/tools): Free web performance tools: Lighthouse score calculator, Core Web Vitals analyzers, and more.
- [Bulk PageSpeed Insights Test - Test Multiple URLs Free · Unlighthouse](/tools/bulk-pagespeed): Free bulk PageSpeed testing tool. Test up to 10 URLs at once with the PageSpeed Insights API. Get Lighthouse scores and Core Web Vitals for multiple pages.
- [CLS Debugger - Find Layout Shift Culprits · Unlighthouse](/tools/cls-debugger): Free CLS testing tool to identify Cumulative Layout Shift culprits. Find exactly which elements cause layout shifts and get actionable fixes.
- [Core Web Vitals Test - Free CWV Checker · Unlighthouse](/tools/cwv-checker): 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.
- [Core Web Vitals Comparison - Benchmark Against Competitors · Unlighthouse](/tools/cwv-compare): Compare Core Web Vitals across multiple websites. See how your LCP, CLS, and INP stack up against competitors with real Chrome user data.
- [Core Web Vitals History - Track Performance Over Time · Unlighthouse](/tools/cwv-history): Free CrUX history viewer. Track 25 weeks of LCP, CLS, and INP trends from real Chrome users. Monitor Core Web Vitals changes over time.
- [INP Analyzer - Test Interaction to Next Paint · Unlighthouse](/tools/inp-analyzer): Free INP testing tool. Analyze your Interaction to Next Paint score, find long tasks blocking the main thread, and improve responsiveness.
- [LCP Element Finder - Identify Your Largest Contentful Paint · Unlighthouse](/tools/lcp-finder): Free LCP test tool. Find your Largest Contentful Paint element, see timing breakdowns, and get actionable recommendations to improve loading speed.
- [Lighthouse Report Viewer - Upload & Analyze JSON Reports · Unlighthouse](/tools/lighthouse-report-viewer): Free Lighthouse JSON report viewer. Upload and visualize your Lighthouse audit results with interactive scores, metrics, and detailed breakdowns.
- [Lighthouse Score Calculator - How Performance Scores Work · Unlighthouse](/tools/lighthouse-score-calculator): Interactive Lighthouse performance score calculator. Understand how FCP, LCP, TBT, CLS, and Speed Index weights and thresholds determine your score.
- [PageSpeed Insights - Full Performance Report · Unlighthouse](/tools/pagespeed-insights-performance): Comprehensive PageSpeed Insights performance report with Core Web Vitals, resource analysis, third-party breakdown, and actionable recommendations.
- [TTFB Checker - Test Time to First Byte · Unlighthouse](/tools/ttfb-checker): Free TTFB test tool. Check your server response time with real Chrome user data (CrUX). Compare field vs lab TTFB and track trends over time.