Pagespeed & Lighthouse Monitoring

Run third-party scripts from a web worker. Partytown is a lazy-loaded library to help relocate resource intensive scripts into a web worker, and off of the main thread. Its goal is to help speed up sites by dedicating the main thread to your code, and offloading third-party scripts to a web worker.

Global performance insights for your site. Run Lighthouse from multiple locations to get valuable insights for your site across the world.

Nobody Likes a Slow Website. We built this Website Speed Test to help you analyze your website load speed.The test is designed to help make your site faster by identifying what about a webpage is fast, slow, too big, and so on.

Yellow Lab Tools is a free online web performance analyzer. It audits a webpage for performance and front-end quality issues. And it's open-source!

An interactive flamegraph visualizer. Use it to help you make your software faster.

PageSpeed Insights (PSI) reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved. PSI provides both lab and field data about a page.

Website Performance Monitoring. See how people experience the speed of your website, then identify and fix performance issues.

Welcome to the wonderful world of Web Performance. Sitespeed.io is an open source tool that helps you analyse and optimise your website speed and performance, based on performance best practices.

Visualize web performance against competitors. Web performance visualization and comparison tool. Analyze website loading against competitors.

Monitor website performance and Lighthouse scores. Get alerts when there's a problem. Benchmark against competitors. Optimize search engine rankings, conversion rates, and user experience.

Page Speed Monitoring. Treo makes it easy to track your site's web performance, test new features, and benchmark against competitors.

What is your website speed. Discover the low hanging fruit on your web pages to improve things in order to give your site a speed bump.

Easy Page Speed Benchmarking. Compare performance metrics of your pages against each other or your competitors using Google PageSpeed Insights.

GTmetrix is a free tool to test and monitor your page's performance. Using Lighthouse, GTmetrix generates scores for your pages and offers actionable recommendations on how to optimize them.

Test. Succeed. Iterate. Load-Test-As-Code: Gatling is a load testing tool for web applications, designed for DevOps and Continuous Integration.

Page speed monitoring without the hassle. Calibre automates testing, reporting and alerting, so you don’t have to. It’s built for teams who want to be fast.

Building high quality web experiences for users is at the core of all our efforts. With WebPageTest, we strive to provide performance products and resources to our global and growing community of developers, third-party platforms, technical consultants and others.

Panelbear is the easiest way to measure your website's most important metrics, so you can deliver a great end user experience.

A free online tool to easily calculate performance budgets for your projects.