Install XnView and navigate to your folder with your group of images.

Select each one you intend to resize.

when you obtain them selected, right-click and choose Batch Processing from the contextual menu.

How to Batch Resize Groups of Photographs Using XnView

Youre given this Dialog Box.

it’s possible for you to also edit the Overwrite options, like Ive done.

Other helpful option is asking it to Open output folder in Explorer.

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Click to the Transformations tab.

Were going to apply a Resize action.

choose the highlighted Add > to use the action.

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opt for radial marked with the % to resize your image by percent and then opt for

.

You have numerous options on the contextual menu that pops up.

Leaving my Resample on the default setting, I click Go.

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XnView cranks through the files and resizes them.

XnView conveniently opens the folder with my newly shrunken images.

Heres a quick comparison of the change in filesize of one of the random images.

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XnView is free softwarefor viewing, editing, and batch editing image files.

Download it for all versions of Windows, from Win 95 through Windows 7,here.

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Windows