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I have a pdf document which covers half of an A4 page. Is there a way to duplicate the text/images of that document, such that I get a single page A4 document (pdf file) with twice the orginal content, one above each other? Since the original only covers half a page, no scaling should be necessary.

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3 Answers 3

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You can use a combination of pdfjam and pdftk to do this:

pdfjam --offset '0mm -148.5mm' half-a4.pdf --outfile other-a4.pdf
pdftk half-a4.pdf stamp other-a4.pdf output double.pdf

pdfjam is being used to shift the page down half a page (A4 = 297mm tall, and 297÷2=148.5). If you need to shift the other way, you'd use -110mm 0mm.

Then pdftk puts the two pages on top of each other.

half A4 (original) + other half A4 (generated) = double (generated)

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  • This works well, however often when overlapping files with PDFTK there are two problems: 1) only two files at a time can be overlapped, so a multi-step process is needed; 2) most PDF files have a while "background" (actually a rectangle) which needs to be removed otherwise it may partially overlap the other objects from previous files. LibreOffice Draw can do the latter step fairly easily in most cases
    – Davide
    Jul 4, 2022 at 20:42
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You can try the command convert as follows:

convert -density 300 -define pdf:fit-page=A4 <in.pdf> <out.pdf>

Another solution:

pdfjam --outfile <output.pdf> --paper a4paper <input.pdf>

Main man page is here

Manual is here

Download here

Example commands are here

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  • This did not do anything. The output.pdf file looks the same as the input. Sep 5, 2018 at 20:42
  • Did you try the command convert something like convert -density 300 -define pdf:fit-page=A4 <in.pdf> <out.pdf>
    – user88036
    Sep 5, 2018 at 20:51
  • Yes, I tried both, and neither worked for me. Sep 6, 2018 at 12:52
  • Same results here... Apr 8, 2019 at 12:36
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You could use pdfjam --nup to achieve this. This would put two pages onto one page at A4 size.

pdfjam --nup 1x2 --papersize '{210mm,297mm}' input.pdf

If you wanted to ensure no scaling, that could be added to the command like so:

pdfjam --nup 1x2 --papersize '{210mm,297mm}' --noautoscale true input.pdf

Note that it's unclear if the document in question is A4 size with half of each page containing content and the rest being blank or if each page is half the size of an A4 sheet and filled with content. This solution is for the latter.

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  • Adminbee edited my answer to the exact thing and downvoted me?
    – Nick
    Sep 8, 2023 at 11:25

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