# Image brightness and contrast editor

> Preview exposure, brightness and contrast adjustments.

[Open tool](https://www.toolcabana.com/su/image-brightness-and-contrast-editor) · [Images and photography](https://www.toolcabana.com/su/category/images-and-photography)

Tool ID: image-brightness-and-contrast-editor. Requested language: su. Description language: en. Complete guide translation: no; untranslated sections use English.

## Overview (en)

The Image brightness and contrast editor takes one image and returns a PNG with your brightness and contrast settings applied at the original pixel dimensions. Both controls are percentages from 0 to 300, where 100 leaves the image unchanged, lower values darken or flatten it and higher values brighten or add contrast. The defaults start at 110%.

## Supported tasks (en)

Preview exposure, brightness and contrast adjustments.

## Steps (en)

1. Choose a source file. If the tool accepts multiple files, arrange them in the order you want.
2. Set brightness (%), contrast (%).
3. Run image brightness and contrast editor, review the output, then use the available copy or download controls.

## Settings

- Brightness (%) (en; key: brightness; type: number); minimum: 0; maximum: 300
- Contrast (%) (en; key: contrast; type: number); minimum: 0; maximum: 300

## Limitations (en)

Images use the existing 32-megapixel canvas bound. Up to 100 source images are allowed where supported. Pasted HTML is bounded to 200,000 characters; Mermaid diagrams to 20,000 characters and 300 lines. SVG and PNG generation require a browser.

## Privacy and connections (en)

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

## Questions (en)

### What do the brightness and contrast percentages mean?

Both settings work as percentages of the original. 100% leaves the image unchanged, 0% brightness turns it black, 0% contrast turns it flat gray, and values up to 300% brighten or increase contrast. They are applied together as canvas filters.

### Will adjusting brightness change my image size or format?

The pixel dimensions stay the same as the source image. The adjusted result is always exported as a PNG file, even if you started from a JPEG or another format the browser can open.

### How do I brighten a dark photo without losing too much detail?

Start with a moderate brightness value such as 120% to 140% and raise contrast slightly to keep shadows defined. Very high values push light areas to pure white, and those clipped highlights cannot be recovered later from the exported PNG.

### Where is my input processed?

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

### What are the input limits?

Images use the existing 32-megapixel canvas bound. Up to 100 source images are allowed where supported. Pasted HTML is bounded to 200,000 characters; Mermaid diagrams to 20,000 characters and 300 lines. SVG and PNG generation require a browser.

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