Workspace Files stay on your device
images · adjust
Brightness & Contrast
Brightness adds the same amount (−100…+100) to every channel; contrast scales around mid-grey (0.5×–2×). Applied exactly per pixel, clamped at 0/255, saved as lossless PNG so the numbers you set are the numbers you get.
A little guidance. A better result.
How to use Brightness & Contrast
Exact per-pixel brightness offset and contrast factor, clamped, lossless PNG out.
Prepare your input
Open an image with lighting to adjust.
Use the workspace
Tune brightness and contrast while watching the preview.
Check your result
Check shadow and highlight detail before saving PNG.
Know the limits
Values are clamped at channel limits; extreme adjustments can lose detail rather than recover it.
Where does my input go?
This browser tool processes your input on your device. Optional analytics is a separate choice; it is not needed to use the tool. Keep your original until you have checked the result.
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