18 Website Speed and Performance Checking Tools

Google is taking site’s loading speed into consideration in determining its ranking. Even though this will not land a big impact, it is still something we (webmasters) should really look into. The reason is pretty simple – majority of visitors are usually in rush and no one is fond of waiting half a century before the website finally load its content or failed to load.

In another words, if your site is slow, you are subjected to lose a lot of visitors. Visitors are traffic, traffic affects reputation and they can potentially generate revenue. It can be a domino effect if one ignore the consequences of a slow-loading site.

It is essential to identify what builds up your website before you jump into the codes trying to speed things up because it cannot be done without knowing the culprits that are slowing down your website. This article compile a collection of useful web service and tools that will help you to diagnose and analyze you site, allowing you to understand your site better.

Web Services


Test the load time of all Website objects (html, images, Javascript, css, iframes and others). You can also check how fast every element of your Website load and improve the slow-loading items. At the summary of test results, you see the report of the site loading time, loading time of each element, element sizes and the total number of elements.



Combines two of the most popular Firefox performance add-ons – Yslow and Google Page Speed. Gtmetrix gives you suggestions what you need to improve your website. Although Yslow and Google page speed are recommended for Firefox, it can also be applicable to other browser.


Light Speed Now

Test your website speed performance, and get the report sent to your inbox.


Load Impact

Loadimpact is a very important tool for large Website visited by tens of thousands visitors each day. A free account allows you to check the loading impact with 50 simulated users, anything more you’ll have to upgrade to a premium account.



Site-Perf fully emulates natural browser behavior downloading your page with all the images, CSS, JS and other files – just like a regular visitor and on the report you can see Website page loading what files start loading at first and how fast. It as very useful performance report to find elements that you need to improve your Website loading time.



Benchmark your website or test the speed of your web connection.


Gomez Networks

Conduct a real-time Instant Test for an individual Web page to test its performance from an external node location.



Allows you to monitor how long it takes for a user to download one or more of your web site pages.



Allows you to compare your website’s speed against your competitors.



Gives you the option to understand how your page is loading with different visitor’s Internet connection speeds. With Webtoolhub you will get information about page size, loading time with different Internet connection speeds and will get information about all Css, Javascript and Images that are used on page. Nothing more nothing less: all that you need for basic page speed test.



Iwebtool gives you the option to compare up to ten pages in same time. You also can check homepage, categories or posts loading time with just one click.



Shows the duration of a given website. This value can be used for showing how long a website take to load and if it is better to optimize the website or change a (slow) ISP.



Get performance data on any website on the fly without having to create a test script.




Open source tool for testing performance and scalability of web services. It runs HTTP load tests, which are useful for capacity planning, benchmarking, analysis, and system tuning.


Google Page Speed

Page Speed is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them.

Google Page Speed


YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.



Internet Explorer plugin that visually displays the underlying requests made by the browser for content. It also provides suggestions on how to improve the performance of the measured page.



Multi-Mechanize is an open source framework for web performance and load testing. It allows you to run simultaneous python scripts to generate load (synthetic transactions) against a web site or web service.


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