Automatic Contrast

This is a browser tool that automatically optimizes the contrast of images!

It works on both computers and smartphones.
Image processing is done locally.

Automatically optimizes the balance of light and dark in photos to create a clearer impression!

Images that are too dark or too light can achieve natural contrast with just one click.
All can be used for

free

To optimize the boundary between brightness and darkness, the following processes are combined.

Histogram Analysis:

Analyzes the light and dark distribution of the entire image and calculates the optimal correction values.

Gamma Correction:

Converts excessively bright or dark areas into natural gradations.

Detail Preservation:

Adjusts so that details do not get lost even when contrast is increased.

Real-Time Preview:

Results can be immediately checked.

Compatibility Size limit: 1 file

up to 200MB

Simultaneous limit: Up to 100 files per upload
Retention period：

1 month to unlimited

（extendable）
Deletion:

Deletable from the upload device when cookies are enabled

Supported extensions：

gif,bmp,png,jpg,jpeg,webp,avif,ico