How do I adjust brightness and contrast of an image?

Upload your image, then use the brightness slider (-100 to +100) and contrast slider (-100 to +100) to adjust. The preview updates in real time. Click Apply and download the result.

What is the difference between brightness and contrast?

Brightness controls how light or dark the image is overall. Contrast controls the difference between the lightest and darkest areas — higher contrast makes lights brighter and darks darker.

Can I adjust brightness on multiple images at once?

Yes. Upload multiple images and the same brightness/contrast settings will be applied to all.

Is the brightness tool free?

Yes, completely free. No account required, no watermarks.

Are my images private?

Yes. All processing happens in your browser using the Canvas API. Your images never leave your device.

Adjust Image Brightness and Contrast

Brighten, darken, or boost the contrast of any image instantly. Batch process multiple photos at once. Free, fast, and private — processed in your browser.

Drop images here, paste, or click to select

Features

Brightness slider from -100 to +100

Contrast slider from -100 to +100

Batch process multiple images at once

PNG output preserves full quality

No upload required — 100% private

Works offline after first load

How to Use

Upload images by drag & drop or click

Adjust brightness and contrast sliders

Click Apply Adjustments