# GoogleChrome/lighthouse

Automated auditing, performance metrics, and best practices for the web.

Repository: https://github.com/GoogleChrome/lighthouse
Canonical: https://ross.abutalabs.com/products/lighthouse
Homepage: https://developer.chrome.com/docs/lighthouse/overview/
Language: JavaScript
License: Apache-2.0
License Family: permissive
Topics: audit, best-practices, performance-metrics, pwa, web, performance-analysis, developer-tools, chrome-devtools
Last push: 2026-08-26T16:48:21+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 93, longevity 100
- inputs: {"age_days": 3831, "days_push": 7, "days_rel": 44, "gap_med": 25.5, "n_releases_24m": 23}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 30702, forks 9757 (observed 2026-08-28T04:11:54.568006+00:00)

## What it is
Lighthouse is an open-source automated auditing tool from Google that analyzes web pages for performance, accessibility, SEO, and best practices, generating actionable reports. It can be run from Chrome DevTools, a Node CLI, as a Node module, or via CI integrations like Lighthouse CI.

## Use cases
- audit my website's performance and core web vitals
- check accessibility and SEO issues on a web page
- run automated performance audits in CI to catch regressions
- measure page load metrics like LCP and TBT
- audit a progressive web app against best practices
- generate a performance report for a URL from the command line

## When to choose
- you need standardized web page quality audits for performance, accessibility, SEO, and best practices
- you want to gate deployments on performance regressions via Lighthouse CI
- you want audits runnable from DevTools, CLI, or programmatically in Node

## When to avoid
- you need real-user monitoring (RUM) rather than lab-based synthetic audits
- you need load testing or stress testing of servers
- you need to audit non-web applications or native mobile apps

## Facets
- artifact type: cli-tool
- maturity: active
- function: testing, benchmarking, developer-tools, monitoring
- domain: web-development, performance, developer-tools, accessibility
- platform: cli, browser, cross-platform
- tags: web-performance, auditing, lighthouse, seo, pwa, core-web-vitals, chrome-devtools, ci, nodejs

## Member repositories
- GoogleChrome/lighthouse (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:54.568006+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:52:44.196342+00:00, confidence not recorded.
  - readme: https://github.com/GoogleChrome/lighthouse (fetched 2026-08-28T04:11:54.568006+00:00, sha 9a9d04f96456)
  - homepage: https://developer.chrome.com/docs/lighthouse/overview/ (fetched 2026-08-29T07:50:03.367075+00:00, sha 2ba0de175b20)
  - site_page: https://developer.chrome.com/docs (fetched 2026-08-29T07:50:03.376431+00:00, sha e332f343e20e)
  - site_page: https://developer.chrome.com/docs/web-platform (fetched 2026-08-29T07:50:03.378345+00:00, sha 3a64aa5949b9)
  - site_page: https://developer.chrome.com/docs/capabilities (fetched 2026-08-29T07:50:03.380543+00:00, sha fa7a497e35fc)
  - site_page: https://developer.chrome.com/docs/automation-and-testing (fetched 2026-08-29T07:50:03.382364+00:00, sha 9d1a85eb8718)
  - site_page: https://developer.chrome.com/docs/chromedriver (fetched 2026-08-29T07:50:03.384476+00:00, sha 299702e6528a)
  - site_page: https://developer.chrome.com/docs/extensions (fetched 2026-08-29T07:50:03.386992+00:00, sha 1b3000706122)
  - site_page: https://developer.chrome.com/docs/webstore (fetched 2026-08-29T07:50:03.389306+00:00, sha 7e2ba0f4b2c3)
  - site_page: https://developer.chrome.com/docs/chromium (fetched 2026-08-29T07:50:03.391159+00:00, sha 5b41a2712c9e)
- Data as of 2026-08-30T08:39:29.467469+00:00.