Here are some of my favourite tools for web perf and analytics:

Monitoring - Free tier. 50 monitors. Sends a request every 5 minutes to a website. - Free tier. Gives average response times.

Azure Application Insights

Infrastructure - eg is this a wordpress site, what webserver etc.. This handles redirects well

Command line tools



Apache benchmarks load testing from the command line
JMeter and this video was a useful 10 minute guide.

YSlow for testing webpages as a browser plugin
Lighthouse Chrome extension - scores on perf, compression, caching, CDN


I found an incomplete SSL Cert security chain using: SSL Labs

Issues with security headers

OWASP Zed Attach Proxy (ZAP) pen testing tool for finding vulnerabilities in web apps. I’ve only briefly used this and it pointed to the same issues as above.

Web Accessibility

Lighthouse Chrome extension