How It Works

Upload your PDF or image file, choose a replacement color for black pixels, adjust the precision slider to control how "black" a pixel needs to be for replacement, preview the results, then download your modified file. Perfect for printing when you're low on black ink!

or drag and drop your PDF or image files here

Supported formats: PDF, JPG, PNG, GIF, BMP, TIFF, WEBP

Selected Files (0)

    Total Size: 0 KB

    Black Detection Precision

    How dark should a pixel be to get replaced? Lower values = only pure black, higher values = includes dark grays too.

    Pure Black Only 15% Include Dark Colors

    Replacement Color

    Choose which color to replace black pixels with:

    Navy Blue
    Dark Green
    Maroon
    Purple
    Brown
    Custom
    Processing...0%

    Preview

    Original
    Original
    Processed
    Processed

    Processing Complete!

    Files Processed:0
    Pixels Replaced:0
    Replacement Color:Navy Blue