Increase Image Brightness
Rescue photos that came out too dark. Drag the slider to lighten the image while keeping highlights from blowing out, then download the brighter version.
Free · No sign-up · Files stay on your device
How to use Increase Brightness
- 1Add your dark photos.
- 2Drag the brightness slider to the right until the photo looks right.
- 3Click "Apply" and download the brightened images.
Features
- Adjust with a single slider from -100 to +100
- Batch process up to 100 images
- Keeps the original format and size
- Transparency in PNG and WebP is preserved
- Private: images stay on your device
How the brightening works
Each pixel is moved part of the way toward white, in proportion to how far it is from white. Dark areas gain the most, while areas that are already bright change only a little, so highlights do not turn into flat white patches.
Tips for dark photos
Small adjustments of 15–30 usually look most natural. If the photo looks washed out after brightening, increase the contrast slightly with the Adjust Contrast tool.
Frequently asked questions
Will brightening reduce quality?
PNG files keep exact quality. JPG and WebP files are re-saved at high quality (92%), which looks the same for almost all photos.
Can I brighten many photos at once?
Yes. Add up to 100 images and the same adjustment is applied to all of them.
Can I darken a photo instead?
Yes. Drag the slider to the left, or use the Decrease Brightness tool.