Its a conversion tool, not a distribution tool.
Re:PDFed Hacker News Daily
by SimonPStevens on Tuesday November 16, 2010 @11:13AM
(#1910509)
That's my point. This web app is doing the content extraction and nothing else. (I can see how perhaps I wasn't clear on that)
I'm saying that it would only be illegal if he attempted to distribute the content too, which he doesn't.
This is legal in the same way that software that rips MP3s from CDs is legal.
On the other hand, distributing the content isn't. So you can rip the content and use it personally, but you can't distribute it without permission.