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!Combine multiple PDF files

October 2024 · 1 minute read

Posted in:  command line openbsd freebsd linux 



I sometimes want to combine two or three PDF files into one (to print them
two pages on a sheet, mostly).

I did this recently and here I write it down again so I can find it again
(I will forget this until the next time I need it again):

```console
$ gs -q -sPAPERSIZE=letter -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=output.pdf file1.pdf file2.pdf file3.pdf ...
```

Found on [Stack Overflow](https://stackoverflow.com/questions/2507766/merge-convert-multiple-pdf-files-into-one-pdf/2507825#2507825).

I also found another solution (further down at the link above) usable, but it produces much bigger files:

```console
$ qpdf --empty --pages *.pdf -- out.pdf
```


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