Batch xBR (Online)

This tool lets you upscale pixel art utilising:
xBR smooth scaling algorithm.
Scale Support: 2x, 3x and 4x.

You can select multiple files, and there's an option to zip the output images.
Press on individual output images to download individually.

NOTE:This method adds a
1px border (BEFORE xBR is applied)
(to assure pixels don't merge with canvas edge.)
best method imo.

Which xBR version?

xBR(2x)
xBR(3x)
xBR(4x)

Trim the surrounding transparent pixels from output images?

(method has been updated to be a cleaner transparency trim)

Input	Output