Adobe offers a free online tool to convert your pdf files to HTML and TXT formats.
Converting PDF files online for Free
You just want to type the pdf url where it is located and select the option to get as HTML or Text file. Select pdf files that have low pages to convert, that enabels you to quickly convert the file soon. The results will be delivered through the next page after the conversion completes. Then you can copy it to Notepad, Wordpad, MS-Word etc. If you have lots of time to wait then go for big files or read the next option.
Converting PDF files through Email
If your pdf files are in local hard disk drive, CD-ROM and can be submitted as a MIME attachment to an email message. If you like to get the pdf file as a plain txt format then send the pdf file to pdf2txt@adobe.com and for HTML send the pdf file to pdf2html@adobe.com, you will get return the files through your inbox to use it as you like.
