GTmetrix - 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.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
PageSpeed Insights - PageSpeed is addon for ...
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
WebPagetest - Run a free website speed test from multiple locations around the globe using real browsers...
Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.