Cross Browser Compatibility Testing Checklist

Apart from the intended and appropriate working of a web application, its compatibility and functioning across multiple browsers is a significant factor that needs to be considered while developing the web applications.

Cross browser testing is a unique testing technique, developed in the direction of testing the compatibility of a web application on multiple variants of browsers. In addition, cross browser testing also ensures the appropriate and similar functioning of a web application across all heterogeneous browsers.

Thus, cross browser testing is an imperative process which needs to be carried out, conscientiously so as to avoid any sort of negligence or deficiency in the web application's compatibility quality. Here, we are listing out some of the noteworthy points that may be considered prior and during the cross browser testing to ensure maximum coverage and best possible results.


Below given are the activities or tasks that may be considered prior to the execution of cross browser compatibility testing activity.

  • Determining the scope and amount of testing needed.
  • Listing out the targeted browsers for each different operating system including mobile browsers to maximize the pool of users.
  • Equipping the test environment with the different sorts of browsers as identified & needed above, along with other necessary tools & resources like mobile devices, etc.

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Checklist For or during the Cross Compatibility Testing:

Cross Browser Compatibility Testing Checklist Infographics

1. General:

  • Validating the correct CSS & HTML.
  • Validating the correct XHTML.
  • Validating the SSL certificate for all the specified & targeted browsers.
  • Validating the web pages and client sided forms and fields with and without the Javascript.
  • Viewing web pages on screens of diverse range.
  • Ensuring correct DOCTYPE for each and every web page.

2. Layout and Design:

  • Checking the design, style, layout and presentation consistency across all the browsers.
  • To check that if images are in their standard resolutions and proposed alignment on each browser or not.
  • Font with its attributes such as colour, size formatting etc., which were actually implemented and used, is working identically for all the browsers.
  • Checkboxes, radio buttons, forms are aligned correctly.
  • Consistency in the colour and contrast across all different browsers.
  • To check out the header and footer layout of the web pages.
  • Ensuring website's responsive quality across each targeted browser.
  • Checking the alignment of data content on the web pages.
  • Proper spacing between sections, fields, paragraphs, images and data contents.
  • Ensuring a good number of audio and video formats to support media files/data for each different browser.
  • Horizontal and Vertical scroll bar appearance.
  • Special characters requiring html character encoding.
  • Zoom-in and Zoom-out the web pages.
  • Mouse Hover and tool tips.
  • Drop-down field.
  • Proper navigation between the web pages.

3. Functionality:

  • Whether plug-ins required for the web application is supported by all the browsers or not.
  • Uploading or Downloading any file or image or data in multiple formats.
  • Ajax and jQuery functionality needs to be tested.
  • Testing the navigation links, search option and error page.
  • Validating the forms and fields for each different browser.
  • Validating the different functionalities like form submit, saving the data, importing or exporting file, etc.
  • Animation and flash work consistency.
  • Interaction with web pages through mouse, keyboard, etc. in a similar way for all the browsers.
  • Validating the working of the scripts used in the website across all targeted browser.
  • Performance of the web application on different browsers for multiple variants of load.

Although, above given checklist contains necessary and sufficient amount of activities to effectively perform the cross browser compatibility testing, however, it may further be broaden with the skill, experience, thinking ability of a tester to accommodate the increasing complexity and advancement for each different web browsers.


Cross browser compatibility testing checklist acts a source of carrying out the task of cross browser testing to make sure that nothing is left behind, and enables a tester to achieve 100% in making a web application compatible across all available and well-known browsers.

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