For example, such tools are available for ClarisWorks and the Microsoft line of productivity software, Word, Excel, PowerPoint, Publisher, etc. With a productivity tool, the user creates a document in the usual way. Then the user selects an option to create an HTML version of the document. For example Microsoft Word has a Save as HTML option. It is important to note that HTML documents are much more limited in capabilities and options then other productivity software such as word processors.
Graphics take up much more memory and disk space then text.
Also special formatting or other capabilities such as animation may be lost. For example, when MS PowerPoint converts a slideshow to a web document, it creates a single graphic file from each slide, adding buttons to go from one slide to another. Text animation and slide transitions are lost. If you use these tools to open an already existing HTML file, it will be converted to the native format of the program you are using. For example Word would convert it to a Word document.