Change Image Brightness
Quickly increment or decrement the brightness of any image.
Slide left to darken, slide right to lighten.
Adjusted Result
Lighten or Darken Any Photo
Fix photos that are too dark or too bright — drag the brightness slider to lighten shadows or deepen the whole image, with a live preview of every change.
The adjustment runs entirely in your browser on a canvas, so your photos never leave your device. Apply and download when it looks right.
Live brightness slider
Lighten dark shots or tone down bright ones, watching the result update in real time.
Private by design
All processing happens locally in your browser — your photos are never uploaded to a server.
Brightness vs exposure
Brightness shifts every tone by the same amount, while exposure scales them — brightness is the quick fix; exposure and gamma give finer control over shadows and highlights.
How to use
- Drop your photo into the upload zone.
- Drag the brightness slider up or down.
- Click Apply, then download the result.
Frequently Asked Questions
What does the brightness slider do?
It lightens or darkens the entire image by shifting all tones up or down together.
How is brightness different from exposure?
Brightness adds a flat shift to all pixels; exposure scales tones, which behaves more like a camera exposure change.
Can it fix a dark photo?
Raising brightness reveals shadow detail — combine with contrast for the best rescue of dull shots.
Are my photos uploaded anywhere?
No. The adjustment runs entirely in your browser — your images never leave your device.
Is the tool free?
Yes, free with no signup.
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