TOOL » IMAGE_MANIPULATOR » IMAGEMAGICK » FORMATS

Png

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Examples ​

Transparent background into color ​

shell
convert input.png -background '#D9D5C1' -flatten output.png

Invert RGB colors ​

Keep transparent pixels as is.

shell
convert input.png -channel RGB -negate output.png

Blurred border ​

Add a border that surrounds a transparent image. -blur is used as the size of the border, and -level is used as a blur (to create shiny or shadow effect).

shell
convert star.png -bordercolor none -border 10 -background '#FFF' -alpha background -channel A -blur 0x5 -level 0,40% -trim +repage shiny_star.png

Rounded square ​

Add a rounded square as background to a transparent image.

shell
convert -size 32x32 xc:none -draw 'roundrectangle 0,0,30,30,8,8' mask.png
convert original.png -resize 26x26 -bordercolor white -border 3 -background white -flatten with-white-bg.png
convert with-white-bg.png -matte mask.png -compose DstIn -composite final.png