# Is there any free way to split PDF pages down the middle?

by enamdar
Tags: free, middle, pages, split
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 Quote by berkeman And yes, he could try to lie, but there are often ways to figure that out.
Sorry to dredge up the past--I'm sincerely looking for a way to split the pages in pdfs of scanned journals/books--all academic stuff covered by fair use rules. I want to be able to read these pdfs on my kindle without having to zoom in.
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P: 41,032
 Quote by cslave1 Sorry to dredge up the past--I'm sincerely looking for a way to split the pages in pdfs of scanned journals/books--all academic stuff covered by fair use rules. I want to be able to read these pdfs on my kindle without having to zoom in.
I'll have to go back and re-read the thread, but did nothing suggested so far work for you?
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 Quote by berkeman I'll have to go back and re-read the thread, but did nothing suggested so far work for you?

Anyway...

I eventually gave up on the problem.

The work around I used was to print the file and physically cut the document and then rescan it. Fortunately OCR and printing technology makes that possible though it was a dreadful waste of paper.

If you find something please do post here what is found, I'd like to have the option even if my need is no longer pressing.
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P: 41,032
 Quote by Innomen You answered before you read what you were answering? *facepalm* Anyway... I eventually gave up on the problem. The work around I used was to print the file and physically cut the document and then rescan it. Fortunately OCR and printing technology makes that possible though it was a dreadful waste of paper. If you find something please do post here what is found, I'd like to have the option even if my need is no longer pressing.
I sometimes do things out of order, yes.

Interesting solution. I wonder if there is a way to use a flat panel monitor on top of the scanner, instead of having to print out the paper version.... The focal plane is the plane of the scanner glass, though, so that may not work.
 P: 2 Thanks guys, Here's my new theory: 1) first print to file using cutepdf or something similar; when you go to print, print two copies and select collate--or is it deselect collate?--whichever way makes it so that you duplicate pages throughout the document. 2) next, do a batch 180 degrees rotation of every other page, so that, for instance, page one of the scanned document will be on the left side of page one of the file and page two of the scanned document will be on the left side of the second page of the file. In other words, you will have a complete and correct sequence of the scanned pages on both the left and right sides of the pdf (in lanscape view), because you've duplicated and alternately rotated each two-page image. 3) Now you should be able to crop and discard one half of every page (because the half you're discarding should be the first half of the next page). 4) Once you've done the batch cropping, you'll need to re-rotate every other page so that all pages are oriented the same. The end result should be a single file with all of the scanned pages, each on a single pdf page. What do y'all think? I'll test it out and let you know what happens.
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 Quote by Innomen "A-PDF Page Cut" will do what you want, the free version water marks the file though, if that matters. I'm also still looking for a free version. I'll post back here if I find one. @berkeman Looking for a way to avoid having to say "I don't know." eh? Begin Rant: "Legal" is a matter of opinion, one that varies from district to district, country to country, and person to person. And that's not even beginning to touch on the legal gray areas of pending court cases or the IP law reform movement and fair use debates, or basic ethics and moral imperatives. Ultimately it's not your business, and its silly to ask because if he has any doubt about your reaction he'll just lie. You know, Xerox machines in libraries were illegal for a time. I guess we know which side of that debate you'd have been on. You and Jack Valenti. I'd be just a little ashamed of being on that side of the line, but hey, that's just me.
My vote goes to this program. It is excellent, fast, and free! Of course the water mark, on the first page only, is actually a link to the products webpage. No biggie. If you don't like the watermark pay for full version.

If you have Acrobat just delete the first page and Wah La, no more watermark! Sweet!!!
 P: 17 Wow, thank you guys for posting this. Just to let everyone know, A-PDF works like a charm under Wine on Linux Mint 9. This is the kind of program I would be happy buying (if i did this type of stuff very often or for work). P.S. I sometimes torrent e-copies of books which I legally own as paper versions. Can't wait until the IP lawyers start trying to chew on that. lol.
 P: 5 Update, a little work flow advice!! In Acrobat, if you have it, export a copy of the first page of your original PDF document that you are interested in splitting and save to desktop. Then import that page back into your document using Acrobat. Effectively, you now have two first pages. Next process with A-PDF. After you process your document through A-PDF re-open PDF in Acrobat and you can now delete that watermarked page that A-PDF created and then your document is clean!!! P.S. You will need to have Adobe Acrobat to accomplish this!
 P: 1 I know this thread is a bit old, but since it turns up first in my search results for the same problem, I thought I might share another solution. I've been using the free program Briss to split the scanned pdfs and automatically rearrange them in proper order. Here's a link for anyone with the same problem: Briss.
 P: 2 old thread, but for the sake of future googlers with the same problem, if you have pdftk, imagemagick and perl, here's an anwser (modify density and chop arguments as you like): explode the pages: > pdftk book.pdf burst right pages > perl -we 'foreach(@ARGV){$f=$_;/pg_(\d\d\d\d)/;$n=2*$1+1;print"cr_$n.pdf\n";convert -density 300$f -gravity West -chop 1500x0 cr_$n.pdf}' pg*.pdf left pages: > perl -we 'foreach(@ARGV){$f=$_;/pg_(\d\d\d\d)/;$n=2*$1;print"cr_$n.pdf\n";convert -density 300 $f -gravity West -chop 1500x0+1500+0 cr_$n.pdf}' pg*.pdf recover the book: > pdftk *.pdf cat output newbook.pdf alessandro
 P: 2 since pdftk is not smart enough to deal with input files order, replace the last step with: > FILES=perl -we 'foreach $i (1..439) {print"cr_$i.pdf "}' | xargs; pdftk \$FILES cat output newbook.pdf
 P: 1 You can do it like this. I used Acrobat Pro 9. Suppose you have a .pdf file = doc.pdf Copy and paste it (to the same folder that doc.pdf is in) = copy of doc.pdf From Acrobat, split copy of doc.pdf into single pages = copy of doc.pdf part 1, .... part 2, .... part n. Select all those single pages and copy them again = copy of copy of doc.pdf part 1, .... part 2, part n. Using Acrobat's "combine" feature merge all the single page files into a single file. Move one set of files up (or down) (I found that doing this in blocks of 5-at-a-time and then fine tuning the positions worked best) such that copy of doc.pdf part n and copy of copy of doc.pdf part n appear *successively* in the list i.e. you now have n pairs of copy of doc.pdf part n copy of copy of doc.pdf part n You now have a pdf consisting of n duplicate double pages. Now use Acrobat's "crop" tool to crop e.g. the left hand side of odd numbered pages and the right hand side of even numbered pages. You have now "split" the original double paged .pdf into a single paged .pdf (with 2n pages as the n page original) Voila!