I am converting a PDF (which I made with R) to a PNG with a command like this:

convert -density 200 foo.pdf bar.png

This generates a PNG allright, but the white background is transparent in the resulting PNG. This is not what I want, I want the background to be white in the PNG as well. How can I achieve this?


  • I am using Xubuntu.
  • What is weird, I did the same sequence on a different linux and computer: first generate picture with R in PDF format, then convert from PDF to PNG, and on that installation it does not convert the white background into transparency, just as I want it. But, I do not know where the difference is caused (R, convert or what).

2 Answers 2


Try to add this setting:



  • Note that if the original PDF has multiple pages, this will result in the content of different pages superimposed on each other.
    – gerrit
    Jul 13, 2018 at 15:07

Best way is to add -alpha remove -alpha off because -flatten merges all pages if any and would be depreciated ( -layers flatten is recommended )

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