Lighthouse is an

open-source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use and view the source code, design documents, or content of the product. The open source model is a decentrali ...

, automated tool for measuring the quality of

web page A web page (or webpage) is a World Wide Web, Web document that is accessed in a web browser. A website typically consists of many web pages hyperlink, linked together under a common domain name. The term "web page" is therefore a metaphor of pap ...

s developed by

Google Google LLC (, ) is an American multinational corporation and technology company focusing on online advertising, search engine technology, cloud computing, computer software, quantum computing, e-commerce, consumer electronics, and artificial ...

. It can be run against any web page, public or, requiring authentication. Lighthouse audits

performance A performance is an act or process of staging or presenting a play, concert, or other form of entertainment. It is also defined as the action or process of carrying out or accomplishing an action, task, or function. Performance has evolved glo ...

, accessibility, and

search engine optimization Search engine optimization (SEO) is the process of improving the quality and quantity of Web traffic, website traffic to a website or a web page from web search engine, search engines. SEO targets unpaid search traffic (usually referred to as ...

factors of

web pages A web page (or webpage) is a World Wide Web, Web document that is accessed in a web browser. A website typically consists of many web pages hyperlink, linked together under a common domain name. The term "web page" is therefore a metaphor of pap ...

, this is the major difference from Google PageSpeed, Lighthouse provides more detail information. It also includes the ability to test

progressive web applications A progressive web application (PWA), or progressive web app, is a type of web app that can be installed on a device as a standalone application. PWAs are installed using the offline cache of the device's web browser. PWAs were introduced from 2 ...

for compliance with standards and best practices. Lighthouse aims to help

web developers A web developer is a programmer who develops World Wide Web applications using a client–server model. The applications typically use HTML, CSS, and JavaScript in the client, and any general-purpose programming language in the server. is used ...

, the tool can be run by using Chrome

browser extension A browser extension is a software module for customizing a web browser. Browsers typically allow users to install a variety of extensions, including user interface modifications, cookie management, ad blocking, and the custom scripting and st ...

or by using terminal (command) for batch auditing a list of URLs. Google's recommendation is for using the online version o
Page Speed Insights
as of 15th May 2015. Lighthouse ersion 10 - May 2023includes a metric for Progressive Web Applications to ensure that PWA's are fast and reliable, installable and optimised for modern 7th and 8th generation mobile technology. Lighthouse can audit webpage in desktop version and mobile version. In command mode (cmd in Windows), the developer is able to select the factors that need to be audited and other options by using the command line. Google_Lighthouse_extension

Recent versions of Lighthouse offer insights into how to optimize the Core Web Vitals metrics (which is one of the signals used by Google's algorithm to rank pages), as announced by Google engineer Addy Osmani in 2021. As of now, Google uses three parameters to measure Core Web Vitals compliance, which are: * Largest Contentful Paint
LCP
* Cumulative Layout Shift
CLS
* Total Blocking Time
TBT
as a proxy for First Input Delay
FID
On 10th May 2023, Google announced that ''Interaction to Next Paint''
INP
will replace FID as the metric measuring responsiveness of a page. The move is aimed at getting a better handle on the total time taken for user interactions, rather than just the first interaction. These changes will start affecting page results from March 2024.

References

External links

* {{Google FOSS

Lighthouse A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lens (optics), lenses and to serve as a beacon for navigational aid for maritime pilots at sea or on inland waterways. Ligh ...

Free web development software Search engine optimization Web accessibility Free and open-source software

See also

References

External links