Website speed testing tools

Website Speed Testing Tools is one of the ways to know about the speed of your site. Website speed is one of the parameters that determine the SEO ranking of your website.

In addition to search engine optimisation (SEO), website speed also plays a vital role in determining website traffic and conversion rates. For example, sometimes a one-second delay in a website can cause a 7% drop in sales.

Therefore, maximising the speed of the website is one of the significant measures to improve the profitability of the website. Today, We will introduce four website performance detection tools with you: GTmetrix, PageSpeed Insights, Pingdom Tools and WebPageTest. In the article, we will add the essential functions of each tool and make some comparisons so that everyone can quickly. These tools have a preliminary understanding.

First, let’s take a brief look at the basic differences between GTmetrix, PageSpeed Insights, Pingdom Tools, and WebPageTest through the following table:

Tools Price Location Connection Mobile Testing Custom Testing
GTmetrix Free and Premium Yes Yes Yes No
Pagespeed Insights Free No No Yes No
Pingdom Tools Free And Premium Yes No Yes No
WebpageTest Free Yes Yes Yes Yes

Function comparison

The following are the functions of these tools and the differences between each tool:

Usage and fees

  • GTmetrix is a free online tool, as long as you register an account for free, you can test the performance of your website. You can enter the website URL for a test, but you can also choose GTmetrix PRO, which is an advanced product of GTmetrix, which can provide higher priority and some additional functions for your test. The basic plan is free and can monitor three websites regularly (only in Vancouver, Canada, only provides free monitoring once a day), while the paid plan starts at $14.95 per month.
  • PageSpeed Insights is Google’s website performance evaluation tool. The tool is free to use, just enter the URL to start performance testing on your website. There are no paid options.
  • Pingdom tool is a commonly used tool beyond the scope of website performance monitoring. In addition to page speed analysis, Pingdom also includes uptime monitoring, transaction monitoring, and server monitoring tools with a monitoring system to prevent site problems. Its website monitoring package starts at $42.12 per month. Pingdom provides newly registered users with a 7-day free trial of the charging function experience, which can be used to do a comprehensive monitoring of the optimisation results.
  • WebPageTest is another website performance monitoring tool; it is entirely free to use and open source. There are many monitoring circuits provided by WebPageTest, and the tools are also the most complicated.

Device and browser selection

You may want to test your website from different browsers and devices based on various situations. An excellent testing tool should allow you to do this.

  • GTmetrix enables you to test the website from the selected device and browser combination (including mobile phones). However, you need to sign up for a free account to customise these options.
  • PageSpeed Insights shows you two sets of scores and results-for PC desktops and mobile devices. However, you don’t have much customisation to choose the type of mobile device on which you want to test the website.
  • Pingdom Tools can indeed test your website on mobile devices.
  • WebPageTest allows you to specify the device combination of the browser, and there are a large number of available devices for you to choose from.

Test the venue

The loading time of the website also depends on the test location and the server location. This is because if the user and the server are located far away, each request takes several milliseconds. This small delay may cause the page load time to increase. If your customers are mainly from a specific region of the world, your server should be as close to them as possible.

  • GTmetrix allows you to specify the test location, which covers the most significant regions in the world (including Hong Kong, China). You need to register an account to customise this function.
  • PageSpeed Insights does not allow you to specify a location, which is most likely calculated internally based on the server location.
  • Pingdom tools have servers to choose from in each state.
  • WebPageTest, including Chinese routes, provide dozens of location choices.

Waterfall analysis

A critical function of these test tools used to carefully analyse the bottleneck of website design and structure and waterfall of page loading order. During web page loading, the browser requests resources such as style sheets, images, and scripts in sequence. The waterfall chart visually shows the loading time of each support and its status relative to the overall loading of the page.

GTmetrix, Pingdom Tools, and WebPageTest all show you waterfall charts so that you have a deep understanding of the website’s resources.


PageSpeed Insights does not have waterfall charts.

Additional features

GTmetrix integrated Google’s PageSpeed Insights and Yahoo’s YSlow rules in a test to give you an external perspective on how the site works. GTmetrix also allows you to view test responses recorded across devices. If you choose to use an account on GTmetrix, you can also track page performance over time. Finally, GTmetrix also enables you to simulate tests with ad blockers enabled, connection restrictions and use of REST API.

Pingdom Tools allows you to monitor and track website uptime and set alerts for various situations. Paid users can regularly monitor the status of the website at different points in time.

WebPageTest takes you to the public version of the website, but you can use the WebPageTest API to create a private instance of WebPageTest. You can also use the API to integrate WebPageTest into the CI tool.

Also, WebPageTest allows you to write custom scripts to simulate website login before performing the test. Therefore, you can test the page behind the authentication layer in the web application. However, the results of these tests are publicly available, so make sure to use a test account. This is a detailed guide about writing scripts using WebPageTest.

4 Website page speed tools compared


GTmetrix has a series of functions that allow you to check the performance of your website. It summarises the results into three indicators: page load time, total page size, and total HTTP requests. The results also show how these metrics compare to the average site tested on GTmetrix.

Gtmetrix Website Speed Testing Tools

When performing a short test on the website on GTmetrix, you cannot specify the test location, browser, and connection settings. For example, the default test location is Vancouver. After registering an account for free, you can choose another location.

The PageSpeed and YSlow tabs show the most critical parameters, and you should evaluate the results on these parameters. In addition to the number of requests and redirects, request size and image optimisation also play a role in ranking. Resources such as pictures and videos should be optimised for the web for a quick presentation on the browser.

Since HTTP requests seem to harm the score, you can navigate to the “Waterfall” tab to analyse how much time each application took while the page was loading. This will enable you to find the request that caused the bottleneck during the page load. After creating an account on GTmetrix and performing multiple tests, you can use the video and graphics.

PageSpeed Insights website testing tools

PageSpeed Insights shows you two leading tabs mobile and desktop.

Website Speed Testing Tools

The tool can also provide you with specific operating instructions to improve your score.

pagespeed Insights Website Speed Testing Tools

When testing with PageSpeed Insights, you will get a series of different tips and analysis to understand the possible problems with your website. PageSpeed Insights can identify a large number of third-party requests, lack of caching strategy or excessive DOM structure.

Although the operation items provided by the tool are right, few options can be customised. You cannot specify standard parameters, such as connection limits and server location. Also, the tool does not report these parameters.

Because PageSpeed Insights is provided as a standalone tool, you will not be able to create an account and track test results over time, and will only have the option to run each test manually.

Pingdom tool

To start a one-time test on Pingdom Tools, enter the URL directly and specify the location of the test server. Each continent provides you with one or two options. After the test is complete, you can see the results. Overall, the Pingdom Tools results are closer to Yahoo’s YSlow tools.

Pingdom Website Speed Testing Tools

The next part of the results shows the main areas of focus of the site. Some standard features of testing are also highlighted here.


One of the more useful blocks provided by Pingdom Tools on the page is under “Content size by content type” and “Requests by content type”. Using these blocks, you can further explore which types and content sources have the most impact on your results.

Website Speed Testing Tools

In the last section, Pingdom displays a list of requests on the page, similar to the Waterfall tab in GTmetrix. You can interactively analyse which resources spend the most time.

WebPageTest website speed testing tools

This is a simple but powerful website speed testing tool.

WebpageTest Website Speed Testing Tools

This tool performs three tests, and the results shows median statistics. This summary lists the operational indicators. You can also see the compressed request waterfall. Also, screenshots of the loaded website and options for viewing slide views and test videos are displayed. The full tab displays the waterfall, which contains more detailed information and metrics for each run.

The Performance View tab displays a complete list of optimisations for the website. It lists all resources and stacks them with parameters that affect website performance. The content classification, domain, and processing tabs show the distribution of content and requests on the page. You can use these tabs when you need to find a solution to a given problem in more depth. Image analysis and request maps redirect you to other services.

WebPageTest also enables you to create custom indicators to evaluate your website. You can specify custom metrics during testing, or you can attach static JavaScript files when running private instances.

WebPageTest provides the most customisation options among the tools discussed in this article. With a simple test tab, you can enter the URL of the website to be tested and the test configuration. You can also choose to perform a Lighthouse audit.

How to choose Best website Speed testing tools

In this article, we studied GTmetrix, PageSpeed Insights, Pingdom Tools, and WebPageTest to determine which tool is best for various performance tests of your website.

First of all, these tools support free temporary testing. In addition to brief testing, Pingdom Tools and GTmetrix also offer paid premium tool packages. PageSpeed Insights and WebPageTest do not have any advanced plans.

In summary, we recommend the following:

  • If you need to use tools for simple testing, try Pingdom Tools. It will show you all the information you need to know to understand the speed of the website.
  • If you need detailed test results and track them over time, you should continue to use GTmetrix. 👈  recommendations
  • For actionable insights that directly affect SEO, you should use Google’s PageSpeed Insights. 👈 Best for SEO
  • To understand in more detail how the test works and what you want to test individually (for example, in a development scenario), go ahead and use WebPageTest.

If you want to speed up your site page speed, then follow this article.

Which of your favourite website speed testing tools GTmetrix, PageSpeed Insights, Pingdom Tools, and WebPageTest? Please let us know in the comments below.

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