Black and White

If you want to give an interesting twist to a color photograph by turning it into a grayscale or black-and-white image, try reaConverter's set of image editing tools and you will achieve this in seconds.

reaConverter provides an entire set of image manipulation options when you plan to switch to black-and-white. This editing tool is also particularly effective for correcting scanned black-and-white images, which usually tend to be large in size and not particularly clear. With just a few clicks you can visibly improve contrast, making scanned images look cleaner and clearer, while significantly decreasing their file size. Even if your images are low quality, our cutting-edge technology can enhance them to meet the highest standards. With our advanced algorithms, we can increase the resolution, sharpen the details, and improve the overall quality of your images, making them look more professional and polished.

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Online Editor

1. Open Images

First, open all the images you intent to edit. You can do this via the software's handy drag-and-drop feature, you can add them one by one from your computer or add entire folders with images.

2. Add Black and White Action

Next, go to the Image editing tab, and press Add action → Color adjustments → Black & White. You will then be able to choose between several options for turning your images to grayscale or black-and-white.

The dithering method and the Floyd-Steinberg algorithm will provide a conversion in which the original color tones are reflected in shades of gray, whereas the Auto mode will polarize the entire image between pure black and white. Additional conversion methods are also available — try them out and see how they work on your images in real time, by clicking the Preview button.

3. Save the Result

Finally, decide if you want to convert your images to a new format and choose a location for them.

When this is done, simply press Convert and check the dialogue box until all your files are edited and converted. It shouldn't take more than a few seconds.

Edit images on your PC

The fast and easy way to make pictures black&white on your PC is to use reaConverter. The software runs completely offline, keeping your files safe and private.

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Edit with command-line tool

You can also make pictures black and white using command-line interface, either manually or through automated scripts. reaConverter Pro includes a command-line tool called cons_rcp.exe — an advanced feature designed for professional use, available exclusively in the Pro edition.

Black and White example:

cons_rcp.exe -s "C:\Path_to\input_file.jpg" -o "C:\Path_to\output_file.jpg" -black_white t 200

Manual

-black_white (converts to black & white)
  Optional parameters:
	  1. Conversion type (Syntax: g, d, f, a, m, t)
	     where "g", "d", "f", "a", "m", "t" mean grayscale, dithering, Floyd-Steinberg,
	     auto, maximum-entropy, thresholding algorithms.
	  2. Threshold level (Syntax: 127, integer from 1 to 255)
  Example:
    -black_white t 200

You are welcome to contact our technical support when you have any questions about reaConverter.

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reaConverter offers advanced batch processing, editing, and conversion for virtually every image format — with unmatched precision and speed.