PageSpeed Insights is described as 'PageSpeed is addon for Firebug (debugger addon for Mozilla Firefox ) for analyzing of page loading process and suggesting to webmaster how speed up page loading' and is an app in the Development category. There are more than 25 alternatives to PageSpeed Insights for a variety of platforms, including Online / Web-based, SaaS, Google Chrome, Windows and Firefox. The best alternative is Screpy. It's not free, so if you're looking for a free alternative, you could try Fiddler or Google Lighthouse. Other great apps like PageSpeed Insights are GTmetrix (Freemium), WebPagetest (Free, Open Source), Yellow Lab Tools (Free, Open Source) and DareBoost (Freemium).
Screpy is an AI-based web analysis tool that can analyze all pages of your websites in one dashboard and monitor them with your team. It's powered by Lighthouse and it also includes some different analysis tools (SEO, SERP, W3C, Uptime, etc).
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Almost everyone thinks Screpy is a great alternative to PageSpeed Insights.
Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data.
Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO and more.
Use this free Website Speed Test to analyze the load speed of your websites, and learn how to make them faster. Nobody Likes a Slow Website We built this Website Speed Test to help you analyze your website load speed.
Boost your SEO, speed and security: Checkbot for Chrome crawls your site to test you’re following over 50+ best practices. Test 1,000s of pages in minutes for broken links, duplicate content, invalid HTML, insecure forms, redirect chains and more.
Free open-source website monitoring software, easy to set up and use for monitoring web sites. You can monitor single web pages, multiple web pages, pages in sitemap and even your whole web site using spider. You can check HTTP result codes and even contents of the checked pages.