What are the Headless Browsers?

Headless Browsers are the Web Browsers without Head or GUI(Graphical User Interface).

I.E. You can’t see whatever to your screen, applications run at the backend.

Headless Browsers are the software programs that get entry to the web pages but don’t display them to the user.

Why have we used Headless Browsers?

Running your check on a headless device like Linux OS on GUI.

When you need to simulate more than one browser behavior on an unmarried machine.

To use minimal assets because there’s no GUI.

Need on your run check simply for records connection.

When have to we NOT use Headless Browsers

If you need to visually have a look at your check on the browser.

It doesn’t give you exact remarks of what your customer will actually experience for your website. (Page loading Speeds. Etc)

Headless Browsers sometimes may additionally throw errors that aren’t found on actual browsers

Examples of Headless Browsers

  1. Firefox Headless Mode:

With the release of version 56 of Firefox, Mozilla began presenting help for headless testing. Instead of using other tools to simulate browser environments, developers can now connect several exclusive APIs to run Firefox in headless mode and check quite a few use cases.

  1. Headless Chrome:

Developers acquainted with Chrome can release model 59 or later in headless mode to utilize all of the possibilities afforded by means of Chromium and the Blink rendering engine.

  1. PhantomJS:

Complexity is common inside the modern-day internet landscape, and PhantomJS is built to deal with it all using simple command-line testing. This headless WebKit is scriptable through the JavaScript API and makes use of CasperJS to handle testing. Capable of simulating “full navigation scenarios,” PhantomJS can reveal all of the locations in which a user can also encounter errors at the same time as browsing.

  1. HtmlUnit:
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Written in Java, HtmlUnit allows you to use Java code to automate among the fundamental ways in which users interact with websites.


Headless browsers can gain developers in many ways. In this weblog post, we were able to exhibit some famous features of diverse browsers, which provide the choice of headless. Talking approximately the trends, Phantom JS is the most popular headless browser as of now. One can still pick from the variety of other options to be had in keeping with respective needs.