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I would like to turn a grayscale image into a transparent image where:

  • #000000 (black) → turns into → #000000 (black) 0% transparency

  • #FFFFFF (white) → turns into → #000000 (black) 100% transparency

Example image of a grayscale gradient (on the left) and desired result (on the right).

How can I do this in Photoshop?

enter image description here

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  • Load any of the channels as alpha. Hide your layer make new layer fill with black.done.
    – joojaa
    Commented Feb 28, 2021 at 21:52

1 Answer 1

Reset to default
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  • Go to the Channels panel.
  • Hold Ctrl / Cmd and left-click the Gray channel to make a selection.
  • Press Shift + Ctrl / Cmd + I to inverse the selection.
  • Go to the Layers panel.
  • Click the Create a new layer button.
  • Make sure the foreground color is black.
  • Press Alt + Backspace to fill the selection with black.
  • Press Ctrl / Cmd + D to deselect.
  • Delete the Background layer.

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