convert .pdf to .txt?

Hi
just starting to read ebooks on my ds - can anyone help by telling me the name of a FREE converter and where to download it?, i've tried several but they only seem to convert half the file unless you buy the software. I know i'm probably being braindead but i have searched a bit and just seem to be getting more and more frustrated so any help is appreciated!

Uhmmm... If it's me I prefer to open it in my computer, select all text, copy, then paste it to notepad. :)

Does that really work??, i thought i needed a converter like pdfzilla but couldn't find any free ones! - i'll give it a go right now! - thank you
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ok, i'm officially a dumbass! thx kamuikurou!