Image Brightness Adjuster
Brighten/darken image.
Adjust brightness instantly. Free online brightness tool — no uploads.
Calculator Inputs
About Brightness
Brighten/darken image.
Canvas brightness.
Where it is used
Fix dark photos.
How to use the Brightness
- Select Image — select a file (image/*).
- Brightness % (0-200, 100=original) — enter the value (e.g. 120).
- Calculate — press the Calculate button to see the result instantly above.
Formula
Canvas filter brightness()
Examples
Example
brightness:120
Result: Brightened PNG
Frequently Asked Questions
- Range?
- 0=black, 100=original, 200=double bright.