Here is each Web Performance Test Tool I am aware of to help distinguish issues in your webpage/get you some key speed measurements. The thought is you think about an element you need, for example “TTFB” or “areas” or “cascade” and just Cmd + F on this page to discover an apparatus that causes you with that thing.

Please let me know if you have other tools that belong here.

Comprehensive Tools🔗

Tools that try to give you the whole kitchen sink including waterfalls

  • PageSpeed Insights – The original PageSpeed test from Google, aka Lighthouse run on the web – gives you FCP, FID, TTI, screenshots, opportunities, and Diagnostics
  • WebPageTest – This seems the most highly regarded in the webperf circles I know about. You pick a location and a browser. Gives you 3 runs, shows waterfall, and a bunch of stats with letter grades for compression/TTFB, FCP, Document Complete and Fully Loaded times.
  • GTMetrix – Also super highly regarded. Gives you PageSpeed and YSlow recommendations, waterfall, historical graphs, and (for logged in users) filmstrips
  • Dareboost – looks simple, but actually does have filmstrip and waterfall and recommendations!!
  • Falco – Open Source, self-hosted WebPageTest runner. automatically run audits & see the evolution of key performance metrics to easily spot regressions & audit the performance of individual URLs or entire user journeys
  • Sitespeed – also Open Source, self hosted with monitoring 🙂

Services with Paid offerings🔗

  • PerfBeacon – runs Google Lighthouse/Pagespeed insights at a scheduled interval + when triggered by API calls. Price plans from 2.5k – 50k tests per month, 14 day free trial
  • Calibre – set performance budgets from various worldwide locations, receive regular reports, and get performance changes in Pull Requests. Price plans from 5k – 50k tests per month, 15 day free trial

Improvement Recommendations🔗

These offer improvements but didn’t quite make my cut for “Comprehensive Tools” – but are still noteworthy, esp Geekflare’s security tools.

  • Geekflare – Geekflare’s set of 25 tools giving you everything from a Website Performance Audit to TTFB and Traceroute tests and other security related tests. The Audit gives a nice score and a lot of improvement recommendations.
  • Pingdom Tools – you pick a location, it gives you some load time/page size stats, improvement opportunities, and a waterfall with a nice filter
  • RequestMap from Webperf.Tools – Simon Hearnes’ request map generator which focuses on visualizing Third Party Assets. Pick a location, and a device.

Test Banks🔗

Tools which ping your site from multiple locations to give you a global view.

  • Sucuri Performance – pings your site from 16 locations worldwide and gives you connection and TTFB times.
  • Website Speed Test from Dotcom Tools – ping 20+ locations and pick a browser, it shows you load times for first visit and repeat visit!
  • KeyCDN Perf Tools – pings your site from 14 locations worldwide and gives you DNS/Connect times
  • Latency.apex.sh – pings two URLs to compare latency from 13 locations. Good for comparing sites with and without a CDN.

Simple Tools🔗

Tools with simplicity as the appeal – great first checks.

  • TestMySite from Netlify – Netlify’s tool which checks TTFB and HTTPS and gives a score out of 100
  • TestMySite from Google – mobile speed report from Google – lets you generate a report with recommendations for your team
  • Bytecheck.com – gives you a simple waterfall breaking down Redirects + DNS + Connect + SSL + Send + Wait + Receive
  • YellowLab.tools nice letter grades per section
  • Pingdom Tools – you pick a location, it gives you some load time/page size stats, improvement opportunities, and a waterfall with a nice filter
  • 24×7 Page Analyzer – you pick a location, it shows you a waterfall of requests with a PageSpeed score
  • KeyCDN Speed Tool – gives you per-asset download breakdowns – a little TOO detailed to be useful
  • Butterfly – I havent looked into this too much – Unlimited Automated Page Speed Monitoring & Tracking, Security Tracking & Performance Timing – founder is Ciprian on Twitter