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I'm looking for an xpm icon to use as a placeholder until I make something better.

Are there any linux command line tools that create blank images of specified dimensions? Like people use touch to create blank text files.

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The convert command from ImageMagick can be used:

To create a 32x32 image with a white background:

convert -size 32x32 xc:white empty.jpg

To create a 32x32 image with a transparent background:

convert -size 32x32 xc:transparent empty2.png
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    To specify the DPI setting, use the -density 96 switch. imagemagick.org/script/command-line-options.php?#density – colemik Mar 18 '12 at 3:46
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    Please note that jpg's can't be transparent. So, this command will work, but with an ext other than jpg – NoelHunter Aug 30 '16 at 14:56
  • @colemik the -density setting will have no effect when creating blank images – Bert Feb 19 '19 at 21:07
  • Use PNG32:empty.png to get a 32 bit png instead of a 1 bit greyscale png. – konrad May 1 at 16:52
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You can use convert -size 123x456 xc:white x.png. convert is part of ImageMagick.

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If you do not have ImageMagick installed, you can use a short Perl script:

use GD::Simple;
my $i = GD::Simple->new(32,32);
open my $out, '>', 'empty.png' or die;
binmode $out;
print $out $i->png;

Using Python:

from PIL import Image
img = Image.new('RGB', (32,32), color='white')
img.save('empty.png')
quit()

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