Web performance tools

A curated list of tools to optimize and monitor your page performance and Core Web Vitals.

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Lightspeed
Lightspeed

Page speed monitoring tool to optimize and improve your website performance and Core Web Vitals.

Connect, Protect and Build Everywhere
Cloudflare

Make employees, applications and networks faster and more secure everywhere, while reducing complexity and cost.

web.dev
web.dev

Guidance to build modern web experiences that work on any browser.

GoogleChrome/lighthouse
GoogleChrome/lighthouse

Automated auditing, performance metrics, and best practices for the web.

Speed Insights Overview
Vercel Speed Insights

This page lists out and explains all the performance metrics provided by Vercel's Speed Insights feature.

Modern Font Stacks
Modern Font Stacks

System font stack CSS organized by typeface classification for every modern OS. The fastest fonts available. No downloading, no layout shifts, no flashes

Cloud Monitoring as a Service
Datadog

See inside any stack, any app, at any scale, anywhere.

Monitor Page Speed and Core Web Vitals
DebugBear

Make your website faster and improve user experience. Optimize Core Web Vitals and rank higher in Google. Get alerts when your site is too slow. Free 14-day trial.

GTmetrix
GTmetrix

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.

Use Cloudflare Zaraz to instantly optimize your third-party scripts, such as Google Analytics, for better performance and faster load times. To learn more, check out this article: https://lightspeed.run/blog/optimize-google-analytics-performance

Check out the Modern Font Stacks website (https://modernfontstacks.com/) to find system fonts that eliminate the need for downloads, boosting overall performance of your website and reducing load times.

If you are using Next.js, you check out this article to optimize your app performance with dynamic imports: https://lightspeed.run/blog/improve-nextjs-performance-dynamic-imports