What Chrome Lighthouse does
Lighthouse is Google's auditing tool for web pages: you give it a URL, it runs a series of audits against the page, and it generates a report on how well the page did. It covers performance, accessibility, progressive web apps, SEO, and best practices. It can run as part of PageSpeed Insights, in Chrome DevTools, from the command line, or as a Node module, so requests occur when someone initiates an audit of a specific URL rather than on a crawl schedule.
How to control Chrome Lighthouse
Target Chrome Lighthouse in your robots.txt with the Chrome-Lighthouse token. Rules apply per bot, so you can allow this one while blocking others, or the reverse.
Allow Chrome Lighthouse
User-agent: Chrome-Lighthouse
Allow: /Block Chrome Lighthouse
User-agent: Chrome-Lighthouse
Disallow: /How to identify Chrome Lighthouse
Temso identifies Chrome Lighthousetraffic by matching the request's User-Agent header against this pattern. User-agent strings can be spoofed, so treat a match as an indication, not proof.
Chrome-LighthouseChrome Lighthouse FAQ
What is Chrome Lighthouse?
Lighthouse is a page auditing tool from Google that runs audits for performance, accessibility, progressive web apps, SEO, and best practices against a URL you give it, then generates a report. It runs via PageSpeed Insights, Chrome DevTools, the command line, or as a Node module.
How do I block Chrome-Lighthouse?
You can add a robots.txt group with "User-agent: Chrome-Lighthouse" and "Disallow: /". Keep in mind that Lighthouse audits are user-triggered, run only against the specific URL someone submits, and the documentation does not state that Lighthouse checks robots.txt before loading a page, so robots.txt may not prevent audits.
About SEO & Analytics Crawlers
Crawlers behind SEO and marketing-intelligence platforms: backlink databases, site audits, rank tracking, and brand monitoring.
Blocking these has no effect on search or AI visibility. It mainly limits what third-party tools (including your competitors' tools) can see about your site.
