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How does WYSIWYG work?

 WYSIWYG, or "What You See Is What You Get," is a term used to describe the ability of software applications to display content on a computer screen that closely resembles the final output of a printed document or webpage. This technology is used in a wide range of software applications, including word processors, website builders, and graphic design software.

In this blog post, we will explore how WYSIWYG technology works, including its history, advantages, and limitations.

A Brief History of WYSIWYG

The concept of WYSIWYG has been around for decades, with early examples dating back to the 1970s. One of the earliest and most influential WYSIWYG applications was the Bravo word processor, which was developed by Charles Simonyi at Xerox PARC in the early 1970s. Bravo allowed users to see on their computer screens exactly what their printed documents would look like, which was a revolutionary concept at the time.

The concept of WYSIWYG was further popularized in the 1980s with the introduction of desktop publishing software like Adobe PageMaker and QuarkXPress. These programs allowed users to create complex page layouts on their computer screens that closely resembled the final printed output.



Today, WYSIWYG technology is used in a wide range of software applications, from website builders like Squarespace and Wix to document editors like Microsoft Word and Google Docs.

How Does WYSIWYG Work?

At its core, WYSIWYG technology works by rendering content on a computer screen in a way that closely matches the final output. This requires the software to accurately display fonts, colors, spacing, and other formatting elements that will be used in the final output.

To accomplish this, WYSIWYG software typically uses one of two approaches: screen-based rendering or print-based rendering.


Screen-based rendering is used in software applications that are primarily designed for on-screen viewing, such as website builders and video editing software. In this approach, the software renders the content on the computer screen using a combination of HTML, CSS, and JavaScript code. The content is then displayed in a web browser or other application, allowing users to see exactly how their webpage or video will look when viewed by others.

Print-based rendering is used in software applications that are primarily designed for print-based output, such as word processors and desktop publishing software. In this approach, the software renders the content on the computer screen using a combination of fonts, colors, and other formatting elements that are specifically designed for print-based output. The content is then sent to a printer or other output device, allowing users to create high-quality printed documents that closely resemble what they see on their computer screen.


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