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I'm trying to compile a nice website/portfolio for internships etc, and I have a folder filled with pixel art I've done (100's of images, not feasible to do them one at a time except if absolutely necessary).

Unfortunately, it's all a little small (32x32 and the like) and the website service I'm using, Squarespace, displays them at actual size. I really want to make all of my art 2x as big (or perhaps 4x as big) without losing the pixel quality (I don't want any blur or anything like that). I've looked in a lot of places and I can only find vague references to unwieldy command line programs that I can't seem to figure out or links to webtools that take several seconds per image to do.

I would much appreciate a step-by-step guide (or link to one) on how to do this in the simplest way possible, for free or very cheap. Thank you!

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    What software do you have access to? – Westside Dec 1 '17 at 0:18
  • @Westside Only free software. Not photoshop or anything like that unfortunately. – W. Miles Dec 1 '17 at 21:09
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You could use imagick's convert with "point" filter Just run loop over all your files like so:

for inputfile in *;
do
convert "$inputfile" -filter Point -resize x256 +antialias "$inputfile".scaled.png;
done

Replace x256 with desired height and change extension as you like.

…this would be for Linuxshell - but there's a Windows version, too. See ImageMagick-Homepage

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Photoshop batch action with Nearest Neighbor resizing.

Set up an action, create a droplet...

Drop the folder on the droplet and let Photoshop do it's thing.

I do this monthly for a client of mine who supplies several images that all require the same 6 steps in Photoshop to make them usable.

Here's a link to a tutorial I just found. It may help. I didn't go through it extensively.

  • Great answer! I don't have photoshop though, is there any other option? – W. Miles Dec 1 '17 at 21:09
  • There is a free trial. – Scott Dec 2 '17 at 2:43

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