Web developers need to be very careful when converting web pages. Software packages such as Microsoft Word allow the web developer to convert a document from a word processing document into a HTML web page. Once the page has been converted into a web page the presentation looks exactly the same as it did when the file was a word processing document.
One of the main advantages of HTML is that it is very structured, which helps a screen reader when they are trying to read out the contents of a web page. However when a word processing document is converted into a web page the structure of the HTML on the converted page can be poor.
Therefore it is important that the web developer check the HTML syntax of a newly converted web page, this can be done manually or using an automated tool such as a HTML validator that checks the HTML syntax for errors e.g. missing start or end tags. If errors are found in the HTML then the validator may be able to automatically correct some of them, however there may be errors that the validator cannot correct. In this case it is recommended that the web developer manually edit the code in order to correct the errors so that the HTML is structured in such a way that a screen reader can easily interpret it.