Suggest an editImprove this articleRefine the answer for “How to use Lighthouse for an audit?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Lighthouse** is a website audit tool in Chrome DevTools that generates a report on a page's performance, SEO, accessibility, and best practices in a few seconds. **Key point:** Lighthouse is a "one-button" audit; it does not fix problems, but it clearly shows where to dig.Shown above the full answer for quick recall.Answer (EN)ImageHere is how to use **Lighthouse** for a site audit, step by step, without the filler: ### 1. Open the site in Chrome Go to the page you want to test. It is better to use incognito mode, without extensions, since they can distort the result. ### 2. Open DevTools - Right-click -> *Inspect* or - `Ctrl + Shift + I` (Windows) / `Cmd + Option + I` (Mac) ### 3. Go to the Lighthouse tab In the developer panel, find the **Lighthouse** tab. If it is not there, click `>>` in the top right of the panel and select it there. ### 4. Choose the audit parameters - Mobile or desktop; - What to analyze: Performance, SEO, Accessibility, Best Practices, PWA; - Usually it is enough to check everything except PWA (unless it is a web app). ### 5. Click "Analyze" / "Generate report" Lighthouse will run a page load simulation and, after a few seconds, show a detailed report. ### 6. Study the results There you will find: - Scores on a 100-point scale; - Core Web Vitals; - Details on what is slowing down loading, which tags are missing, which images can be compressed, and so on. ### 7. Save or export You can export the report as JSON or HTML (for example, to send it to a developer). Lighthouse is a "one-button" audit. It does not fix problems, but it clearly shows where to dig.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.