Analyzes web applications and web pages, collecting modern performance metrics and insights on developer best practices.
# To generate an HTML report for a specific website and save it to a file in the current directory:
lighthouse <https://example.com>
# To generate a JSON report and print it:
lighthouse --output <json> <https://example.com>
# To generate a JSON report and save it to a specific file:
lighthouse --output <json> --output-path <path/to/file.json> <https://example.com>
# To generate a report using the browser in headless mode without logging to stdout:
lighthouse --quiet --chrome-flags="--headless" <https://example.com>
# To generate a report, using the HTTP header key/value pairs in the specified JSON file for all requests:
lighthouse --extra-headers=<path/to/file.json> <https://example.com>
# To generate a report for specific categories only:
lighthouse --only-categories=<performance,accessibility,best-practices,seo,pwa> <https://example.com>
# To generate a report with device emulation and all throttling disabled:
lighthouse --screenEmulation.disabled --throttling-method=<provided> --no-emulatedUserAgent <https://example.com>
# To display help:
lighthouse --help