Try the new photo editor at the link below:
The new photo editor supports batch processing of images.
There will be an image processing queue. Add new filters (bottom)
To change the brightness of the photo, upload the necessary files, and specify the brightness settings (value greater than 0 - increase the brightness, less than 0 - decrease). After that, click the "Download" button and download the processed images.
You can also add additional effects (contrast, saturation, etc.) to improve the photo.
Image processing service