What Is Compatibility Testing And How Is It Important?


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Computers have become an essential part of our lives, and several software applications are developed to help people excel in their careers, work, shop, and many other actions. Online purchasing has become very popular nowadays. While selling the product or software, the online seller needs to keep in mind that the product they are selling should be bug-free; otherwise, the seller might lose their business and reputation. 

The buyer of the software might waste their money by buying defective software. It becomes essential that the software applications you provide to your buyers are worth the amount they are paying for it for enduring the competitive market. For delivering a good quality product, a software application must go to different stages of development in terms of quality, compatibility, reliability, and delivery.

What is software compatibility?

Software compatibility is the capacity for living and working together without any inconsistency. Compatible software applications also worked on the same setup. For instance, if google.com is compatible, it should work seamlessly on all browsers and operating systems.

What is compatibility testing?

Compatibility is non-functional testing for ensuring customer satisfaction. It is used for determining whether your software application or product is skilled enough for running on different browsers, databases, hardware, operating systems, mobile devices, and networks.

The application can also influence different versions, resolutions, internet speed, and configurations. Hence, it becomes important for us to test the application in all possible ways to reduce failures and overcome bug leakage obligations as a non-functional test compatibility testing aims to confirm that the application runs properly on different browsers, versions, OS, and networks successfully.

Types of compatibility testing

  1. Browser compatibility testing
  2. Hardware
  3. Networks
  4. Mobile devices
  5. Operating systems
  6. Versions

It is very popular to check the compatibility of the software application on different browsers like Chrome, Firefox, internet explorer, safari, and opera.


It is processing the application or software compatibility with various hardware configurations.


It is for checking the application in a different network like 3G, Wi-Fi, etc.

Mobile devices

Checking the application is compatible with mobile devices and different platforms like Android, iOS, windows, etc.

Operating systems

Checking the application is compatible with various operating systems like Windows, Linux, Mac, etc.


It is essential to test software applications in various versions of the software. There are mainly two types of version inspection: 

  1. Backward compatibility testing: Testing of the application or software in the older previous version. It is also known as downward compatible.
  2. Forward compatibility Testing: Testing the application of software in New upcoming versions. It is also known as forward compatible.

Why do we perform compatibility testing?

Compatibility testing in software testing is for checking if the application is working in the same way for platforms or not. Usually, the development and testing team tests the application on a single platform.

But as the application is released in production, the customer may test your product on a different platform, and they could find bugs in the application that aren’t worth the in terms of quality stop for reducing such issues and not accepting your customers. You need to test the application on all platforms.

When should you perform compatibility testing?

When your build is stable enough for the test, then you can perform compatibility testing.

Common compatibility testing defects

  1. Changes in the user interface
  2. Changes in a font size
  3. Alignment related issues
  4. Change in CSS style and colour
  5. Scroll bar related issues
  6. Content or label overlapping
  7. Broken tables or frames

Choose what you do to test for compatibility

Note that you can feel the application weirdly comportment of the most critical testing parameters for your application. Decide where you want to test your application, browsers, operating systems, and gadgets. Analyzing the requirements and checking the browser matrix with the customer is the best practice. Let us decide to test our application on all browsers, the OS, and the version. 

Google Analytics will provide you with consistent statistics on a commonly used browser with its version and operating system. An alternative type of statistical analysis system is set up in your application.

Choose pages for testing

Filter out your application’s primary URLs. The choice of pages depends entirely on your application. As part of the compatibility test, you would have to consider the most used modules. It is ok if you take that as part of a compatibility test if your application has a certain template format.

How to perform compatibility testing?

Testing the application in the same browser but different versions. For example, for testing the compatibility of any website, we can download different versions of firefox and install them one by one and test the following website. If the website behaves equally on each version, it will pass the test. Testing the application in different browsers and different versions. For example, for testing any website in a different available browser like Firefox, Safari, Chrome, internet explorer, and Opera.

Benefits of compatibility testing

Compatibility testing is an essential testing process that offers numerous advantages and benefits to the testers. Some of them are mentioned below:

  1. It helps in detecting errors in the software product before being delivered to the end-users.
  2. Reduces the future help test cost mainly for providing relevant and required customer support for various compatibility issues.
  3. Promote the software development procedure as it tackles all compatibility-related issues and validates the performance and functionality of the software across different platforms and devices.
  4. Helps to test the product’s scalability, stability, and usability.
  5. The team could validate that the software meets the business and user requirements and is optimized for quality with compatibility testing.
  6. Guarantees there is no loss of business possible customer visits organization on any platform.
  7. Confirms optimum user experience and 100% customer satisfaction.


The main use of compatibility testing in software testing is making sure the software application is working fine in all aspects of browsers, database, hardware, operating system, mobile devices, and networks. Make a pattern for testing the application in equal time intervals for performing browser and operating system compatibility.

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