Pdfs and Small Screens

Many academic articles are published as two-column pdfs that are a pain and a half on small screens.

Most e-readers have small screens.

I have an Iriver Story Hd. I can't use touch devices and have trouble with glowing screens, so it's been hard trying to find a larger-screen device.

So are there good tools to batch-convert two-column pdfs to more readable formats? Without ocr errors everywhere?

I use Mac OS X on my computer, and Iriver's version of Linux.