An application that opens a document determines its type by the extension in the file name - one or more characters located to the right of the last point. By simply replacing the letters in the file extension, alas, you cannot change its type, that is, the format used when writing data to it. To do this, you need to re-write data in a different format to the file.
Instructions
Step 1
Load the document whose type you want to change to the application intended for working with it. For example, documents stored in files with the doc, docx, docm extensions can be opened in the Microsoft Office Word word processor. To change the document type, this application must be able to save files in the format that you want as a result of converting the original document type. For example, Word can save files in doc, docx, docm, dot, dotm, txt, mht, mhtml, htm, html, rtf, xml, wps formats. And most image viewers can save files in several graphic formats (gif, png, jpg, bmp, etc.). If you need to get a document of one of these types as a result, then open the program menu and select "Save As" - it is present in most programs that have options for saving files.
Step 2
Select the document format you need from the File Type drop-down list, and then click the Save button. Please note that the format you choose may not support the capabilities of the original document format. In this case, when saving, you will receive a corresponding warning and an offer to continue the process with the loss of the capabilities of the original format, or to cancel the procedure - the choice is yours.
Step 3
Use specialized file type conversion software as an alternative. Their advantage is in narrow specialization, that is, such programs most often do not have functions for editing documents, due to which they are lightweight and are distributed free of charge. Sometimes such converters for converting one type of document to another are posted on the Internet for online conversion. For example, you can convert a document from pdf to doc using the online service located at
