Photolisa · extract

Alpha Channel Extractor

Alpha extraction converts an image's transparency channel into a separate grayscale representation.

Image tool workspace

Enable JavaScript to use the processing controls. Tool instructions and limitations are available below.

Understanding alpha channel extractor

Alpha extraction converts an image's transparency channel into a separate grayscale representation.

Check whether white represents opaque or transparent pixels in the destination workflow.

A practical workflow

  1. Choose the required source files, if any. Files are handled as stated in the workspace privacy label.
  2. Set the available controls and apply the operation.
  3. Compare the actual output, check its dimensions and download the generated file.

Decisions and limitations

  • No additional settings are required.

Images up to 16 megapixels and 20 MB. Keep an original copy. Export preserves pixels, not editable layers or original metadata.

Questions about this task

Where do I use the current tool?

Apply the selected adjustment and export a PNG copy.

What should I check for alpha channel extractor?

Check whether white represents opaque or transparent pixels in the destination workflow.

Which settings and formats are confirmed?

PNG. Images up to 16 megapixels and 20 MB. Keep an original copy. Export preserves pixels, not editable layers or original metadata.

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