DebugBear
GTmetrix
SpeedCurve
PageSpeed Insights
WebPagetest
Request Metrics
Pingdom
SpeedVitals
Reactime
Proxyman.io
Atomize React
Sonar by Facebook
React Proto
Ray
Cloud Middleman
HTTP Toolkit
Monitor the performance of your website and benchmark against the competition. Get alerted in Slack or by email when there's a problem.
Continuously test the speed of your website in a controlled lab environment and get in-depth reports to optimize your site. DebugBear is built on top of Lighthouse, but provides debug data that goes far beyond the basic Lighthouse report.
In addition to the lab data, DebugBear also keeps track of the real-user data collected by Google.
DebugBear
ReactimeGTmetrix - GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
SpeedCurve - Monitor your front-end. Beat the competition
Atomize React - An open source design system for ReactJS
PageSpeed Insights - PageSpeed is addon for ...
Sonar by Facebook - Extensible mobile app debugging for iOS and Android