Do you mean in code form for development in a programming IDE, or in something like noptepad?
If notepad, then binary is binary, & will always be binary. Notepad is for text. If the file you are opening is binary, then you can't do anything about it with notepad... unless you mean text from another language like Chinese, or Russian... in which case you can use a different editor to open it that alows you to change the code-page used to display each char code of text correctly. For example: "A" has a specific char code in the english code page set, but that same char code might be "#" in another language's code page set.
If you're talking about downloads... like downloading a text file, then the download server has to set the proper MIME type in the header of the transfer handshake with your browser, so your browser will know what encoding to use to transfer it. Or you can use a downloader that allows you to set the MIME type manually.
Sorry I couldn't be of more help, but I have no idea what u mean. Be a little more specific. :)
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