Adjust Image Brightness Online
Lighten an underexposed photo or calm down a blown-out image with one brightness slider. The preview updates as you move it, and the image stays on your device.
Drop your image here
or
JPG, PNG or WebP · Up to 20MBMore ways to adjust your image
How to use
Upload your JPG, PNG or WebP image.
Move the brightness slider between 0% and 200%.
Use Reset when you want to return to the original brightness.
Choose an output format and download the adjusted image.
Features
Free to use
No signup required
Processed in your browser
Images are not uploaded
Works on mobile and desktop
Why use this tool
Rescue dark indoor photos before sharing them.
Reduce harsh brightness in phone photos taken in direct sun.
Prepare listings and product images that need consistent exposure.
Frequently asked questions
Can I adjust image brightness for free?
Yes. The brightness adjuster is free, has no signup step and does not add a watermark.
Are my images uploaded?
No. Images are processed locally in your browser and are not uploaded.
What image formats are supported?
JPG, PNG and WebP are supported. You can keep the original format or export JPG, PNG or WebP.
What does 100% brightness mean?
It is the original brightness. Values below 100% darken the image and values above 100% make it lighter.