: Using photoshop I want to double the dpi/size of every image in a directory I know of tools such as retinize.it and I know of the wordpress retina 2x plugin. They kind of do what I need,

@Marchetta832

So, since no one wants to answer your question but just argue with your method, I'll complete the answer:

The easiest way to do this is to record an action.


Open the Actions Palette.
Open any image that you want to modify.
Create a new action called "Double DPI" (or something)
Hit "Record"
Change the resolution or just the DPI of the image (which doesn't necessarily change your image.
Stop Recording.
Choose File > Batch Processing
Load the folder and action for this image resize thing and select Save and Close as your options.
fin

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@Lee3735518

Doubling the DPI / image size will do you more harm than good. You can't create pixel information where there is none, all you can do is interpolate between the different pixels.

This is, in effect, what "pixelation" is — interpolating with not enough information.

I would suggest going the other way around — finding a larger image, and creating the smaller ones from there. Either Photoshop "Actions" or Adobe Bridge's "Image Processor" could help you there.

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