JSPM

Create HAR files from Chrome Debugging Protocol data.

A SVG-based LQIP image placeholder generator

CSS selectors complexity and performance analyzer

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

Throttle your connection

Core package for the Coach.

Xray your HAR file and know all about the page

Imagemin meets Rollup!

Package with the lighthouse-viewer files from the official repositories of Lighthouse

Headless Chromium-based web performance metrics collector and monitoring tool

Gulp plugin to optimize PNG and JPG using reSmush.it

This component is a React wrapper for the lighthouse-viewer. It depends on [lighthouse-viewer](../lighthouse-viewer), package that exports the original lighthouse-viewer from Google as an ES modules package.

A Vue.js component for viewing Lighthouse reports

This component is a Svelte wrapper for the lighthouse-viewer. It depends on [lighthouse-viewer](../lighthouse-viewer), package that exports the original lighthouse-viewer from Google as an ES modules package.

A Vue 3 component for viewing Lighthouse reports

Analyzes an image and detects potential improvements for a webpage

Grunt plugin to remove unnecessary bytes of PNG and JPG using Yahoo Smushit

InfluxDB plugin for sitespeed.io

Analyze the web performance of your site

Lighthouse plugin for sitespeed.io

Javascript plugin for sitespeed.io

Cascading Style Sheets plugin for sitespeed.io

Convert blurhash strings to CSS objects

Accessibility statement plugin for sitespeed.io

Page not found plugin for sitespeed.io

HTML plugin for sitespeed.io

WebPerf plugin for sitespeed.io

A tool that audits a webpage for performance and front-end quality issues

Measure browser rendering performance metrics

web performance analyze tool base on remote debugging protocol,fex

Create HAR files from Chrome Debugging Protocol data.

Browser instrumentation helper that makes it easier to capture UX speed metrics

Analyze the web performance of your site using Grunt

Analyze the web performance of your site using Gulp

A nano-sized `preconnect` hint wrapper.

The coach gives you advice on building a better web page

From a Chrome Dev Tools recorded timeline saved as JSON, this will help you identify quickly wich domain name eats most of the CPU

Scripts and Web Components for capturing and displaying WPT traces in a blog

A JavaScript library for measuring FCP, LCP. Report real user measurements to tracking tool.

Unofficial Node.js client for the WebPageTest REST API

GPSI plugin for sitespeed.io

前端性能监控,采集以及上报。用于测量第一个dom生成的时间(FP/FCP/LCP)、用户最早可操作时间（fid|tti）和组件的生命周期性能,，网络状况以及资源大小等等。向监控后台报告实际用户测量值。

Find multiple concurrent <script> or <link> tags and turn 'em into single, combo-handled tags

Browser instrumentation helper that makes it easier to capture UX speed metrics

JavaScript library that measures First (Contentful) Paint (FP/FCP) and First Input Delay (FID). Annotates components’ performance for Vanilla and Angular applications, into the DevTools timeline. Reports all the results to Google Analytics or your favorit

CSS Selector Scene Investigation. Analyses a git codebase for unused CSS selectors against a given CSS files set

Performance budget plugin for Webpack

A prognosticating client-side DNS prefetcher for outbound links.

web performance analyze tool base on remote debugging protocol,fex

The sitespeed.io server

Third party web content database

Compare HAR files.

Convert your HAR file to a summary of a page

A test runner for sitespeed.io server.

A browser cache that only downloads the diff of modified files

Monitor your asset size over time, in your browser, or using the provided HTTP API.

Analyze the web performance of your site

Discover the percent of unused JS on a page with this simple browser proxy

elasticsearch reporter for phantomas

Analyze the web performance of your site

A grunt kitchen that reduces your web ingredients down to their essence for optimal serving. Bon appétit

Create HAR files from Chrome Debugging Protocol data.

PSI report

Analyze the web performance of your site

A CLI tool that analyzes Chrome .trace.json files for performance bottlenecks.

Measure browser rendering performance metrics

PageSpeed Green official Command Line Client (CLI)

This is a fork of sitespeedio/coach. The coach gives you advice on building a better web page

atf (above-the-fold) prints out above-the-fold css for whatever site you want.

CLI tool and lib to gather performance metrics

A beautifully simple CLI for running Lighthouse audits on a statically generated (SSG) website

Web Performance Command Line Tools

The coach gives you advice on building a better web page,this version's advice is in Chinese

Create HAR files from Chrome Debugging Protocol data.

Mesure scripts parse and execution time with this simple browser proxy

PhantomJS-based web performance metrics collector

Create HAR files from Chrome Debugging Protocol data.

phantomas reporter for zabbix (zabbix_sender)

A thin wrapper for the WebPageTest API that report specific metrics as csv/json or send them to Graphite/Statsv

phantomas reportrer for AWS Cloudwatch

build tool agnostic perfromance and benchmarking tool

Browser instrumentation helper that makes it easier to capture UX speed metrics

Node module to optimize and compress PNG, JPG, Gif images using CheetahO compression algorithms

Enable to call sitespeed.io with an API Rest

This component is a React wrapper for the lighthouse-viewer. It depends on [lighthouse-viewer](../lighthouse-viewer), package that exports the original lighthouse-viewer from Google as an ES modules package.