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I know of Yslow with firefox and http://webwait.com/

Any other services around ?

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closed as not constructive by ChrisF Feb 20 '12 at 12:59

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

How is this not constructive? Not to mention that Jeff answered it himself. – Dan Dascalescu Feb 25 '14 at 11:32
It's an app recommendation request. Please see our help center. – Al E. Feb 25 '14 at 12:51
Technically it's also a duplicate - webapps.stackexchange.com/questions/6496/… – ChrisF Feb 25 '14 at 12:56
up vote 10 down vote accepted

Google's Page Speed


AOL's WebPageTest




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+1 for webpagetest.org. It's a very nice service. – splattne Jul 1 '10 at 7:05
yes, webpagetest.org is pretty neat, indeed. – akira Jul 1 '10 at 7:24
some tips for speeding up static file download in an asp.net website stackoverflow.com/questions/3555304/… – Oscar Aug 25 '10 at 7:06

In addition to YSlow and WebPageTest mentioned in other answers I use the LORI (life of request information) extension for Firefox during development to give a quick indication of page speed.


It adds a few fields to the status bar to give you a quick overview of some important figures: time to first byte, time to completion, total size, number of requests

LORI status bar

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Google-Chrome and Opera have builtin tools to analyze websites, including loadtime.

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  1. Pingdom Tools Full Page Test: http://tools.pingdom.com/fpt
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Would have posted more, but don't have enough juju on my account. – danielmiessler Jul 9 '10 at 5:05

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