Brighten Image Online
Increase or decrease image brightness. Free, no signup, works in your browser.
About Brighten Image
This image brightener raises or lowers the brightness of every pixel in your photo. It is especially helpful for rescuing underexposed shots taken in dim lighting, making product photos look cleaner, or toning down images that are too bright. The slider works in both directions, so you can increase brightness or pull it back as needed.
Frequently Asked Questions
How do I brighten a dark photo?
Upload your photo and move the brightness slider to the right. The preview updates in real time. Download when you're happy with the result.
What is the difference between brightness and exposure?
Brightness uniformly shifts all pixel values lighter or darker. Exposure simulates camera settings and affects highlights, midtones, and shadows differently.
Can I fix an underexposed photo with this tool?
For mildly underexposed photos, yes. Increase brightness by 30–60 points. Severely underexposed images may need dedicated photo editing software.