Brightness/Contrast

Set brightness and contrast once and apply the same correction to every image in a folder. Preview the result, then save to any supported format. Offline.

Underexposure and overexposure are two of the most common mistakes when taking photos. But don't consider images which suffer from them as completely destroyed! Change brightness and contrast of your photos by using this powerful batch image editor and converter. It's really easy and quick.

1. Open Images

Open the images you intend to correct by adding them one by one, or by selecting an entire folder.

2. Add Brightness/Contrast Action

Go to the Image editing tab, click Add action → Color adjustments → Brightness/Contrast

Here you can easily adjust the quantity of light that appears in your image and check the result in real time by ticking the Preview button.

3. Save the Result

In the Saving options, you can opt for locating the output images in the same folder as the input ones, in a subfolder or in a new location altogether. After making this choice, decide if you want to preserve the initial format of the images or convert them to a new one. JPG, PNG, WebP and TIFF are just some of the available extensions, together with many other formats.

Finally, press the Convert button and watch the dialogue to see how your files are being edited.

Change Brightness/Contrast on your PC

The fast and easy way to edit Brightness/Contrast on your PC is to use reaConverter. The software runs completely offline, keeping your files safe and private.

Download reaConverter

Edit Brightness/Contrast with command-line imterface

You can also adjust brightness/contrast using command-line tool, 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.

Example

cons_rcp.exe -s "C:\Path_to\input_file.jpg" -o "C:\Path_to\output_file.jpg" -bc b10 c10

Manual

-bc (changes brightness and contrast balance)
  Optional parameters:
	  1. Brightness change (Syntax: b25, integer from -100 to 100)
	  2. Contrast change (Syntax: c25, integer from -100 to 100)
  Example:
    -bc b-10 c10

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