Adjust Brightness
Adjust image brightness
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What is Adjust Brightness?
Adjust image brightness, contrast, and exposure with precision controls. Fix underexposed or overexposed photos, or create the perfect lighting for your images.
Key Features
How to Use Adjust Brightness
Upload your image
Adjust brightness slider
Preview the result
Download the adjusted image
Common Use Cases
Tips & Best Practices
Small adjustments (±20%) usually look most natural
Increase contrast slightly when brightening dark images
For documents, increase brightness and contrast together
Frequently Asked Questions
Can I fix very dark photos?
Yes! Increase brightness to reveal details in underexposed photos. Very dark images may show noise when brightened significantly.
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Adjust Brightness is part of our Images tools collection at AllInAOne. Use our free online tools for all your images needs — no registration required.