Adjust Image Brightness and Contrast Online
Brighten dark photos or add contrast with simple sliders. Batch processing, no upload.
Files never leave your deviceFreeBatch + ZIP
How to use it
- Drag your files into the box or click to choose them.
- Change the settings if needed.
- Press “Start” and download the result.
About Adjust Image Brightness and Contrast Online
Brightness shifts all pixels lighter or darker, while contrast widens or narrows the gap between darks and lights. Small changes of 10 to 20 points often rescue a dull photo. Extreme values can clip detail.
FAQ
What values should I start with?
Try brightness +10 and contrast +15; adjust in small steps and compare.
Are my files uploaded to a server?
No. Everything runs in your browser; your files and text never leave your device.
Is it free? Do I need an account?
The tool is free and needs no registration.
Does it work on a phone?
Yes, in modern desktop and mobile browsers; large files depend on your device power.
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