Removing colors from an image

Grayscale given file


This building block is for removing colors from a JPEG or PNG image and create a grayscale image.

Use cases

  • Reducing memory usage of an image with adding compression artifacts (like in the Compress block)
  • Preparing an image for use in black/white only processing, like printing.


Clicking on given file in the title of the building block lets you pick the desired image from your Google Drive to be signed.

You can deselect the picked image by clicking on the x button on the right of the selected filename.

If no image has been picked, Ultradox will load the given image that is stored in the input variable.

Questions and Feedback

If you have any comments on this page, feel free to add suggestions right to the Google document that we are using to create this site.

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Last Updated: 10/1/18