Adjust Exposure
Simulate camera exposure stops to brighten or darken an image multiplicatively, the way a lens does.
How it works
- 1
Drop your image onto the upload area and set the number of exposure stops.
- 2
Each stop doubles (positive) or halves (negative) every channel value, simulating a real camera aperture or shutter-speed change.
- 3
Click Apply Exposure to download the adjusted image.
Questions
What is an exposure stop?
A stop is a doubling or halving of light. +1 stop multiplies every channel by 2; +2 stops multiplies by 4. Negative stops work the other way. This matches how cameras measure exposure rather than a simple linear brightness offset.
How is this different from the Brightness tool?
Brightness adds a fixed value to every channel, which looks unnatural at large amounts. Exposure multiplies each channel, so bright areas change more than dark areas, producing a result closer to genuine over- or under-exposure.
Does the image leave my device?
No. The exposure adjustment runs entirely in your browser using your device's resources. No file bytes are ever sent to a server.
Will transparency be preserved?
Yes. The alpha channel is not affected by the exposure calculation.
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