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DevToys
Images

PNG transparency

Knock out a colour and export a transparent PNG

Preview

Choose an image to begin

You can also click the preview to sample a colour.

Everything runs in your browser — the image is never uploaded.

How to use / Notes

How to use

  1. Load an image.
  2. Pick the colour to knock out and a tolerance.
  3. Export the transparent PNG.

Notes

  • Processing runs in the browser; images are never uploaded.
  • Too wide a tolerance eats into the subject’s edges—tune it carefully.