The Most Effective Website Testing Checklist

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The Web is a conversational medium where you can’t control the outcome. Regardless of what your opinions are about testing, knowing what you should test and how to monitor certain aspects of your website is crucial for its performance. 

The Most Effective Website Testing Checklist

You have to focus on what you can control and make sure that each aspect of your website is smooth and in good condition.

Running a website is hard work, and it’s only getting harder. The amount of things you have to check is growing each day, but fortunately, there is a system that can help you tackle all the stated software requirements

Website testing is important for finding issues that affect your website’s performance and affect your users' experience significantly. I’ve compiled the most effective website testing checklist for every website owner and marketer out there.

The website testing checklist 

A/B testing

A/B testing is not a new concept. It has been used in everything from marketing to product development and beyond, and it works. A/B testing is simply the practice of comparing two versions of something (e.g. your website) against one another to determine which performs better.

A-B testing

The beauty of A/B testing is that it allows you to make data-backed decisions about your design instead of relying on hunches and assumptions. This is important because, as web designers, we are all guilty of trusting our judgment too much — we have a vision for what we think will work and we don’t want to let go. 

A/B testing helps us remove some of our biases from the equation, so we can see with cold hard facts what does and doesn’t work for users.

Browser testing

Different browsers — even different versions of the same browser — can display your site very differently. 

Browser Testing

If you're developing a new site, start with the most recent version of Chrome, Firefox, and Safari for Mac and PC; these are typically the most standards-compliant browsers, and if you get everything working there, it's likely to work in others as well.

However, don't neglect older browsers: Most people upgrade when prompted, but a significant number don't. And many corporate environments are slow to upgrade because they need to test new versions on all their software systems.

If you're using Microsoft Internet Explorer (IE), be sure to test back to version 10. A lot of people are still using IE 11 at the time of this writing, so if it's not too much trouble, test that one as well.

Cross-browser compatibility testing

Compatibility testing is a testing technique used to identify the compatibility of a software application with the computing environment. In other words, it examines whether the application under test functions as expected in various environments.

If you want your website to work perfectly, it’s necessary to make sure that it’s compatible with all operating systems, browsers, screen resolutions, and mobile devices. Just imagine how many possible combinations may exist between these factors!

When you're building a website or creating a new landing page, you need to make sure that this page will be displayed correctly on any device and any browser. This is where cross-browser compatibility testing comes into play.

Cross-browser testing is a process of checking whether your website works properly on different browsers and their versions. This type of testing is important because not all users have the same browser installed, and each browser has different capabilities.

Mobile testing

Mobile devices have surpassed desktops in terms of the number of users and page views.

Mobile Testing

According to recent research:

Mobile phones account for 62% of digital media time, while desktop-only accounts for 36%.

Tablets account for 2% of digital media time.

Mobile content consumption is growing 5x faster than desktop consumption.

There are a few additional reasons why mobile testing is so important:

Most websites are responsive, so they should be optimized for all devices and screen sizes.

Google uses mobile-first indexing, which means that it now indexes pages by their mobile version first. If your website is not optimized for mobile, you will lose rankings on Google search results and lose traffic too.

More customers access websites via mobile phones than via any other device; businesses should make sure their websites are mobile-friendly.

The website testing checklist for mobile tests that your website looks good on all screen sizes and loads fast when accessed from a mobile phone or tablet using different browsers and operating systems.

Site speed test

Your website speed has a massive influence on your page views, conversion rates, and visitor satisfaction. A delay in loading your site will make your visitors leave before they even have a chance to see your content.

According to Kissmetrics, 40% of consumers abandon a website that takes more than 3 seconds to load, and 79% of those users won’t return.

A site speed test is one of the most effective website testing methods. It helps you make sure that your website loads fast enough, which is extremely important for UX and SEO.

To test the loading speed of your site, you can use tools such as Pingdom or GTMetrix. They will tell you which elements on the page are causing the slow loading speed and what you should do to optimize them.

Google PageSpeed Insights: It checks your site’s speed on mobile and desktop devices and provides you with practical tips on how to improve it.

Pingdom Website Speed Test: It shows you the size of your site, its load time, and the number of requests that have been made to your server.

GTmetrix: This tool calculates your page loading time, provides a score from 0 to 100 on how well the page performs and provides recommendations on how to improve it.

Other things you might take a look at are - 

1. Check whether the website is responsive or not

2. Check your website on all devices like mobile, laptop, desktop, etc.

3. Check the loading time of the website and make sure it is under 2 seconds. If it is more than that then you need to optimize your images, remove redundant code or use a caching plugin

4. Use Pingdom Tool to check the loading time of your website

5. Make sure all elements of the website are clickable on mobile devices

6. Make sure your favicon appears in tabs and bookmarks

Security scan

To avoid the risk of malware infection, you should scan the website for malicious files and other security issues.

Security scan

When running a scan, you can use a variety of online tools, such as Sucuri SiteCheck, which detects malware and other threats on your website.

It's all too easy to leave your website vulnerable, especially if you're not a security expert. Fortunately, many online services can help test for the most common vulnerabilities.

Don't use the same password for every site. If a hacker breaks into one account and obtains your username and password combination, they might try to access everything on the internet with those same credentials. 

The easiest way to avoid this is to use a password manager like LastPass or Dashlane. These services store all of your passwords in an encrypted database, then auto-fill them when you need them. 

You'll still need to remember a single strong master password to access the database, but it will be much easier than trying to remember dozens of different passwords.

Don't click on suspicious links or attachments. It's best to assume that every link or attachment you receive via email is malicious until you determine otherwise. Always hover over hyperlinks before clicking them and check the resulting URL in your browser's address bar. 

Many malicious emails contain links that appear authentic but redirect you to a phony website designed to steal your information. For attachments, scan files for malware before opening them using antivirus software like Malwarebytes or Avast Free Antivirus

Scan the entire site for security vulnerabilities -

  • Check the SSL certificate for expiration.
  • Check the SSL certificate for trustworthiness and quality.
  • Check the SSL certificate for EV status.

1st & 3rd party rich media tests 

1. Ensure that Rich Media loads automatically on page load, without user interaction.

2. Ensure that Rich Media does not load if it is within a pop-up window.

3. Ensure that Rich Media does not load in a frame.

4. Ensure that the correct creative is served for the test.

5. Ensure that the correct landing page URL is displayed when a user clicks on the first impression of the test.

6. Ensure that the correct tracking URLs are fired when a user clicks on the first impression of the test.

Perform an SEO audit 

1. Check that you have a Google Search Console account and ensure it is linked to your site.

2. Ensure that your site is being crawled by Google. If not, review your robots.txt file to see if you need to update anything (Google has some great resources on this subject).

3. Review your meta title tag and description to make sure they are unique and compelling; also ensure they are relevant to the content on the page. If a certain page does not have a meta title tag or description, add them in! These fields can be updated via most CMS systems in the backend of your website.

4. Verify that the meta title tags and descriptions are being displayed properly in the SERP (search engine results page). Use a tool like Moz’s SERP Simulator to see how your pages will appear when they return from search results. 

You may need to adjust your snippets accordingly if there is missing data or “…” displayed, which can be done via Google Search Console as well as via updating meta descriptions for pages within your CMS system.

5. Review all h1 tags on the site to ensure they are unique and descriptive, with relevant keywords included to help with search rankings

Social media integration

One of the most effective methods to drive traffic to your site is through social media marketing. Social media has become a valuable asset for businesses as it allows them to constantly update their followers with information about their products and services.

Social media is also a great way to increase customer engagement, attract new customers and build brand awareness.

If you haven't already integrated social media into your website, it's time to get started!

Does it have the most relevant social media profiles? Find out which social networks your company uses the most. Simply add a link to your site's footer.

Is there a “share” button for every piece of content? This makes it easier for visitors to share your content with their followers on social media.

Do you have social proof such as customer testimonials and reviews? If you want to build trust, display customer reviews and testimonials on your website.


A website test checklist will help you identify issues that affect your website’s performance and user experience, so you can increase conversions and grow your audience.

Being able to test your website is an important skill for every marketer and business owner, as well as anyone who plays a role in creating, updating, or maintaining a website. There is no denying the amount of pressure that comes with this task, either. 

You want to make sure your website works perfectly so that you can increase audience engagement and conversion rates. The list above contains essential tasks you should focus on when testing your website. 

It is meant to serve as a guideline and give you a better understanding of the process. Feel free to add anything else you think it’s necessary.

There are plenty of things to keep in mind, but don’t be overwhelmed. Work your way through each section over time, and make sure you’re putting together a website that is not only ideal for your users but is also primed for conversion.

About the author 

Peter Keszegh

Most people write this part in the third person but I won't. You're at the right place if you want to start or grow your online business. When I'm not busy scaling up my own or other people' businesses, you'll find me trying out new things and discovering new places. Connect with me on Facebook, just let me know how I can help.

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