Check Your Web Design with Webtest.Org

Web Page Test is good free service for freelance bloggers who care about blog SEO. It measures your blog performance such as speed, CSS errors, HTML mark-up and other significant SEO factors.
After a short analysis, Web Page Test gives error reports and suggestion for your blog. You can examine detailed data or check a performance overview.

WebPagetest is a tool that was originally developed by AOL for use internally and was open-sourced in 2008 under a BSD license. The platform is under active development by several companies and community contributors on Google code. The software is also packaged up periodically and available for download if you would like to run your own instance.

The online version at is run by WebPagetest LLC for the benefit of the performance community with several companies and individuals providing the testing infrastructure around the globe. WebPagetest LLC is a company run by Patrick Meenan as an entity to keep WebPagetest independent from any of the partners or other companies involved in the development of the platform.