Lighthouse

Lesson in the Frontend Developer Roadmap · Stage 31: Performance

Last updated 14 September 2026

What is Lighthouse?

Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO, and more. Lighthouse provides reports with actionable insights to help developers improve their website's user experience.

Study this in the interactive course See the whole Frontend roadmap

Free resources to learn Lighthouse

Official docsIntroduction to Lighthouse
Open sourcelighthouse
ArticleGoogle Lighthouse: What It Is & How to Use It
VideoWhat Is Google Lighthouse and How to Use It?

Lighthouse: common questions

Can I learn Lighthouse in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Lighthouse in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Lighthouse tutorial for beginners?

It is lesson 99 of 120 in the free Frontend roadmap, in stage 31, Performance. If you are new to Frontend, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.