What is 100% brightness?

100% brightness represents the photo's original exposure. Values above 100% brighten, below 100% darken.

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Image Brightness Adjuster

Brighten dark underexposed photos or darken overly bright images.

How to Use Image Brightness Adjuster

1Upload your photo.
2Drag the brightness slider left to darken or right to brighten (0% to 200%).
3Preview the lighting changes in real time and download.

Key Features & Benefits

Real-time exposure adjustment slider
Prevents clipping with smooth luminance curves
Reset button to restore original photo
Download in original quality

About Image Brightness Adjuster

Easily adjust photo exposure and lighting. Brighten underexposed shadows or tone down overexposed highlights with an intuitive real-time slider.

Unlike traditional web tools that send your personal data, uploaded photos, or sensitive text to remote cloud servers, our Image Brightness Adjuster operates strictly inside your client browser sandbox. This guarantees high processing speeds without network throttling, and ensures your data privacy is completely preserved.