Windows/Mac/Linux: Virtually every current ereader offers native support for the PDF format, but no PDF was designed for your ereader's 5-7" screen. Briss, a cross-platform open-source tool, gives you several ways to trim PDFs to look better on your ereader.
Briss's user-interface is spare but simple. After loading a PDF file, Briss scans the document to identify and group pages with the same approximate structure into different batches. With books, it's usually even- and odd-numbered pages, because of the way the margins line up. The genius part is that you can trim every page in a batch to exactly the same size and shape, all at once. Start at a corner and drag a blue rectangle over the area you want to keep, then repeat for each batch (see the screenshots above and below).
Briss is particularly good for three things: trimming enough negative space around the text to make the document readable on a small screen, converting two-page "spread" landscape documents to single-page, portrait-oriented files, and knocking off marginal text like page numbers and chapter titles so you can use a free tool like Calibre to convert PDFs into EPUB, MOBI, or any other ereader format without the extra text popping up in the middle of a paragraph and making a mess.
Briss is a free, open source download (with a clever name) for Windows, Mac, and Linux. Do you have another tool you like to use to trim and edit PDFs? Let us know in the comments.
Original Post by Lifehacker