KeyCDN Speed Test

Google PageSpeed Insights

Pingdom

GTmetrix

WebPageTest

DareBoost

Varvy Pagespeed Optimization

UpTrends

dotcom-monitor

PageScoring

Yellow Lab Tools

Google Chrome DevTools

• Windows: F12 or also Ctrl + Shift + I
• Mac: Cmd + Opt + I

Sucuri Load Time Tester

Pagelocity

YSlow

MaxCDN Tools for CSS