Velocidad o tiempo de acceso a una pagina Web

Webs online que dan el tiempo de acceso a una  pagina web (tiempo de carga):

- http://rapid.searchmetrics.com/en/seo-tools/site-analysis/website-speed-test,46.html

- http://www.webtoolhub.com/tn561353-website-speed-test.aspx

- http://www.iwebtool.com/speed_test

- http://www.submitplus.com/freeloadtest.php

- http://www.octagate.com/service/SiteTimer/?Target=AJAX

- http://www.uptrends.com/aspx/free-html-site-page-load-check-tool.aspx

- http://tools.pingdom.com/

- http://webwait.com/

- http://www.webpagetest.org/

- http://internetsupervision.com/

- http://www.gomeznetworks.com/custom/instant_test.html

- http://gtmetrix.com/

- https://browsermob.com/free-website-performance-test

- http://www.webslug.info/index/single

- http://loadimpact.com/